1 ANNOUNCING ESS
****************

The ESS Developers proudly announce the release of ESS 17.11

   Emacs Speaks Statistics (ESS) provides an intelligent, consistent
interface between the user and the software.  ESS interfaces with
R/S-PLUS, SAS, BUGS/JAGS, Stata and other statistical analysis packages
under the UNIX, GNU Linux, Microsoft Windows, macOS and other operating
systems.  ESS is a package for the GNU Emacs and XEmacs text editors
whose features ESS uses to streamline the creation and use of
statistical software.  ESS knows the syntax and grammar of statistical
analysis packages and provides consistent display and editing features
based on that knowledge.  ESS assists in interactive and batch execution
of statements written in these statistical analysis languages.

   ESS is freely available under the GNU General Public License (GPL).
Please read the file COPYING which comes with the distribution, for more
information about the license.  For more detailed information, please
read the README files that come with ESS.

1.1 Getting the Latest Version
==============================

The latest released version of ESS is always available on the web at:
ESS web page (http://ess.r-project.org) or StatLib
(http://lib.stat.cmu.edu/general/ESS/)

1.1.1 Git for ESS development
-----------------------------

For development and experimentation on new ESS features, there is now a
GitHub branch for ESS, available at <https://github.com/emacs-ess/ESS>.

1.2 Current Features
====================

   * Languages Supported:
        * S family (R and S+ AKA S-PLUS)
        * SAS
        * OpenBUGS/JAGS
        * Stata
        * Julia
   * Editing source code (S family, SAS, OpenBUGS/JAGS, Stata, Julia)
        * Syntactic indentation and highlighting of source code
        * Partial evaluation of code
        * Loading and error-checking of code
        * Source code revision maintenance
        * Batch execution (SAS, OpenBUGS/JAGS)
        * Use of imenu to provide links to appropriate functions
   * Interacting with the process (S family, SAS, Stata, Julia)
        * Command-line editing
        * Searchable Command history
        * Command-line completion of S family object names and file
          names
        * Quick access to object lists and search lists
        * Transcript recording
        * Interface to the help system
   * Transcript manipulation (S family, Stata)
        * Recording and saving transcript files
        * Manipulating and editing saved transcripts
        * Re-evaluating commands from transcript files
   * Interaction with Help Pages and other Documentation (R)
        * Fast Navigation
        * Sending Examples to running ESS process.
        * Fast Transfer to Further Help Pages
   * Help File Editing (R)
        * Syntactic indentation and highlighting of source code.
        * Sending Examples to running ESS process.
        * Previewing

1.3 Requirements
================

ESS is most likely to work with current/recent versions of the following
statistical packages: R/S-PLUS, SAS, Stata, OpenBUGS and JAGS.

   ESS supports current, and recent, stable versions of GNU Emacs
(currently, 24.3 or higher; alpha/beta/pre-release versions are NOT
SUPPORTED).

   Due to XEmacs lacking some features that ESS requires, ESS support of
XEmacs ended with ESS 12.04-4.

   To build the PDF documentation, you will need a version of TeX Live
or texinfo that includes texi2dvi (BEWARE: recent TeX Live, and some
texinfo RPMs, do NOT include texi2dvi).

1.4 Stability
=============

All recent released versions are meant to be release-quality versions.
While some new features are being introduced, we are cleaning up and
improving the interface.  We know that there are many remaining
opportunities for documentation improvements, but all contributors are
volunteers and time is precious.  Patches or suggested fixes with bug
reports are much appreciated!

1.5 Mailing List
================

There is a mailing list for discussions and announcements relating to
ESS. Join the list by sending an e-mail with "subscribe ess-help" (or
"help") in the body to <ess-help-request@r-project.org>; contributions
to the list may be mailed to <ess-help@r-project.org>.  Rest assured,
this is a fairly low-volume mailing list.

   The purposes of the mailing list include

   * helping users of ESS to get along with it.
   * discussing aspects of using ESS on Emacs and XEmacs.
   * suggestions for improvements.
   * announcements of new releases of ESS.
   * posting small patches to ESS.

1.6 Reporting Bugs
==================

Please send bug reports, suggestions etc.  to <ESS-bugs@r-project.org>

   The easiest way to do this is within Emacs by typing

   'M-x ess-submit-bug-report'

   This also gives the maintainers valuable information about your
installation which may help us to identify or even fix the bug.

   If Emacs reports an error, backtraces can help us debug the problem.
Type "M-x set-variable RET debug-on-error RET t RET". Then run the
command that causes the error and you should see a *Backtrace* buffer
containing debug information; send us that buffer.

   Note that comments, suggestions, words of praise and large cash
donations are also more than welcome.

1.7 Authors
===========

   * A.J. Rossini (mailto:blindglobe@gmail.com)
   * Richard M. Heiberger (mailto:rmh@temple.edu)
   * Kurt Hornik (mailto:Kurt.Hornik@R-project.org)
   * Martin Maechler (mailto:maechler@stat.math.ethz.ch)
   * Rodney A. Sparapani (mailto:rsparapa@mcw.edu)
   * Stephen Eglen (mailto:stephen@gnu.org)
   * Sebastian P. Luque (mailto:spluque@gmail.com)
   * Henning Redestig (mailto:henning.red@googlemail.com)
   * Vitalie Spinu (mailto:spinuvit@gmail.com)
   * Lionel Henry (mailto:lionel.hry@gmail.com)

1.8 License
===========

The source and documentation of ESS is free software.  You can
redistribute it and/or modify it under the terms of the GNU General
Public License as published by the Free Software Foundation; either
version 2, or (at your option) any later version.

   ESS is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License in
the file COPYING in the same directory as this file for more details.

1.9 New Features
================

Changes and New Features in 17.11:

   * The ESS initialisation process has been streamlined.  You can now
     load the R and Stata modes independently from the rest of ESS. Just
     put '(require 'ess-r-mode)' or '(require 'ess-stata-mode)' in your
     init file.  This is for experienced Emacs users as this requires
     setting up autoloads for '.R' files manually.  We will keep
     maintaining 'ess-site' for easy loading of all ESS features.

   * Reloading and quitting the process is now more robust.  If no
     process is attached, ESS now switches automatically to one
     (prompting you for selection if there are several running).
     Reloading and quitting will now work during a debug session or when
     R is prompting for input (for instance after a crash).  Finally,
     the window configuration is saved and restored after reloading to
     prevent the buffer of the new process from capturing the cursor.

   * ESS[R]: New command 'ess-r-package-use-dir'.  It sets the working
     directory of the current process to the current package directory.

   * ESS[R] Lookup for references in inferior buffers has been improved.
     New variable 'ess-r-package-source-roots' contains package
     sub-directories which are searched recursively during the file
     lookup point.  Directories in 'ess-tracebug-search-path' are now
     also searched recursively.

   * ESS[R] Namespaced evaluation is now automatically enabled only in
     the 'R/' directory.  This way ESS will not attempt to update
     function definitions from a package if you are working from e.g.  a
     test file.

   Changes and New Features in 16.10:

   * ESS[R]: Syntax highlighting is now more consistent.  Backquoted
     names are not fontified as strings (since they really are
     identifiers).  Furthermore they are now correctly recognised when
     they are function definitions or function calls.
   * ESS[R]: Backquoted names and '%op%' operators are recognised as
     sexp.  This is useful for code navigation, e.g.  with 'C-M-f' and
     'C-M-b'.
   * ESS[R]: Integration of outline mode with roxygen examples fields.
     You can use outline mode's code folding commands to fold the
     examples field.  This is especially nice to use with well
     documented packages with long examples set.  Set
     'ess-roxy-fold-examples' to non-nil to automatically fold the
     examples field when you open a buffer.
   * ESS[R]: New experimental feature: syntax highlighting in roxygen
     examples fields.  This is turned off by default.  Set
     'ess-roxy-fontify-examples' to non-nil to try it out.
   * ESS[R]: New package development command 'ess-r-devtools-ask' bound
     to 'C-c C-w C-a'.  It asks with completion for any devtools command
     that takes 'pkg' as argument.
   * ESS[R]: New command 'C-c C-e C-r' to reload the inferior process.
     Currently only implemented for R. The R method runs
     'inferior-ess-r-reload-hook' on reloading.
   * ESS[R]: 'ess-r-package-mode' is now activated in non-file buffers
     as well.

   Bug fixes in 16.10:
   * ESS[R]: Fix broken (un)flagging for debugging inside packages
   * ESS[R]: Fixes (and improvements) in Package development
   * ESS[R]: Completion no longer produces '...=' inside 'list( )'.
   * ESS[R]: Better debugging and tracing in packages.
   * ESS[R]: Better detection of symbols at point.
   * ESS[R]: No more spurious warnings on deletion of temporary files.
   * ESS[julia]: help and completion work (better)
   * ESS[julia]: available via 'ess-remote'

   Changes and New Features in 16.04:

   * ESS[R]: 'developer' functionality has been refactored.  The new
     user interface consists of a single command
     'ess-r-set-evaluation-env' bound by default to 'C-c C-t C-s'.  Once
     an evaluation environment has been set with, all subsequent ESS
     evaluation will source the code into that environment.  By default,
     for file within R packages the evaluation environment is set to the
     package environment.  Set 'ess-r-package-auto-set-evaluation-env'
     to 'nil' to disable this.
   * ESS[R]: New 'ess-r-package-mode' This development mode provides
     features to make package development easier.  Currently, most of
     the commands are based on the 'devtools' packages and are
     accessible with 'C-c C-w' prefix.  See the documentation of
     'ess-r-package-mode' function for all available commands.  With
     'C-u' prefix each command asks for extra arguments to the
     underlying devtools function.  This mode is automatically enabled
     in all files within R packages and is indicated with '[pkg:NAME]'
     in the mode-line.
   * ESS[R]: Help lookup has been improved.  It is now possible to get
     help for namespaced objects such as pkg::foobar.  Furthermore, ESS
     recognizes more reliably when you change 'options('html_type')'.
   * ESS[R]: New specialized breakpoints for debugging magrittr pipes
   * ESS: ESS now implements a simple message passing interface to
     communicate between ESS and inferior process.

   Bug fixes in 16.04:
   * ESS[R]: Roxygen blocks with backtics are now correctly filled
   * ESS[R]: Don't skip breakpoints in magrittr's 'debug_pipe'
   * ESS[R]: Error highlighting now understands 'testthat' type errors
   * ESS[Julia]: Added getwd and setwd generic commands

   Changes and New Features in 15.09:

   * ESS[R]: The indentation logic has been refactored.  It should be
     faster, more consistent and more flexible.  There are three types
     of indentation settings, those starting with 'ess-offset-' give the
     actual offsets, those starting with 'ess-indent-' are control
     (commonly Boolean) variables, and those starting with 'ess-align-'
     are vertical alignment overrides which inhibit default offsets in
     specific situations.  See 'ess-style-alist' for detailed
     description of the new indentation system and provided default
     indentation styles.

   * ESS[R]: Deprecation of old indentation settings.  As a consequence
     of the indentation re-factoring 'ess-brace-imaginary-offset',
     'ess-expression-offset' and all delimiter-specific offsets are
     deprecated.  The settings for indentation of continued statements
     have been replaced by 'ess-offset-continuations'.  It can be set to
     either 'cascade' or 'straight' (the default).
     'ess-arg-function-offset' has been replaced by
     'ess-indent-from-lhs' and has been generalised to assignments.
     This setting now works with both statement blocks and expressions
     and only takes effect for offsets set to 'prev-call' and
     'open-delim' in order to produce a consistent indentation.

   * ESS: A test framework has been set up.

   * ESS[R]: A new RStudio style is provided to mimic as closely as
     possible R files indented via RStudio.  To reproduce the setup of
     some of the RStudio users, the RStudio- style with
     'ess-offset-arguments' set to 'prev-line' is also provided.  In
     addition, the new RRR+ style is equivalent to RRR except it indents
     blocks in function calls relatively to the opening delimiter.  This
     style does not try to save horizontal space and produces more
     indentation.

   * ESS[R]: Roxygen fields will now be indented on paragraph refilling
     in order to make the documentation more readable.  You can also
     refill commented lines in the 'examples' field without squashing
     the surrounding code in the comments.

   * ESS[R]: ESS can now format your code!  This is controlled through
     the settings 'ess-fill-calls' and 'ess-fill-continuations'.  When
     activated, '(fill-paragraph)' formats your calls and your
     formulas/continuations while making sure they don't go past
     'fill-column'.  Repeated refills cycle through different styles
     (see the docstrings for more details).  By default, the refilled
     region blinks.  Set 'ess-blink-filling' to nil to prevent this.

   * ESS[R]: Fix occasional missing error location fontification in
     inferior buffers.

   * ESS[R]: ess-developer now correctly assigned the environment of new
     functions to the package namespace.

   * ESS[Julia]: ?[topic] now works in the *julia* buffer.  Note that
     support for editing Julia code now depends on 'julia-mode.el' from
     the Julia project.  If you install ESS from the official
     tarball/zip file, 'julia-mode.el' is already included.  Otherwise,
     if you install ESS by running 'make', then the latest version of
     'julia-mode.el' is downloaded (and so you need an active internet
     connection to install) during the installation process.
     Alternatively, if you run ESS without running 'make', then ensure
     that you have the 'julia-mode.el', which you can get easily from
     MELPA for example.

   * iESS: For naming inferior processes, ESS can use 'projectile''s
     project root and it does so when
     'ess-gen-proc-buffer-name-function' is set to
     'ess-gen-proc-buffer-name:projectile-or-simple' as by default, or
     to another value beginning with
     'ess-gen-proc-buffer-name:projectile-*'.

   Changes and New Features in 15.03-1:
   * ESS[R]: An indentation bug has been fixed (github issue 163)
   * ESS[R]: On windows, if 'ess-prefer-higher-bit' is non-nil (the
     default), then R-newest will try to run a 64 bit (rather than 32
     bit) version of R.

   Changes and New Features in 15.03:
   * ESS[R]: Full native support for 'company-mode'.
   * ESS[R]: More efficient caching algorithm for R completion.
   * ESS: New offset variable 'ess-close-paren-offset' to control the
     indentation of the closing parentheses.
   * ESS[R]: Ask for CRAN mirror only once per emacs session.
   * ESS[R]: Detect 'library' and 'require' calls for better completion
     caching.
   * Buffer display is now customizable ('ess-show-buffer-action').
   * Use 'y-or-n-p' instead of 'yes-or-no-p' throughout.
   * More support for ODS in ess-sas-graph-view.
   * Makefiles are now both UNIX and GNU friendly.
   * ESS[R]: Simplify directory lookup in 'ess-developer' (#137).
   * Make closed paren indentation consistent

   Bug Fixes in 15.03:
   * Fix open brace indentation bug (#27 in ess/R-ESS-bugs.R).
   * Fix git version lookup
   * Don't check directory modtime in R dialect.
   * Declare all ess macros for edebug.
   * Add 'ess-smart-comma' to eldoc message functions.
   * Inform users when retrieving RDA aliases.
   * Line ending in '~' is also a continuation line.
   * Filing roxy paragraphs works as expected now.
   * In 'ess-developer-add-package', remove incorrect 'wait' argument
     from 'ess-get-words-from-vector' call.
   * Fix #96, #117, #120, #125, #134, #137.
   * Fix ess-quit-r.  Call base::q() even if it is masked.
   * Fix 'ess-show-buffer' to always display the buffer in another
     window.
   * Makefile: Fix cd bug for directories with spaces in them
   * 'ess-kill-buffer-and-go' modified to not restart R

   Changes / Selected Bug Fixes in 14.09:
   * ESS[Julia]: Executable is changed to 'julia'.
   * ESS[Julia]: Completion and help system was adjusted to Julia
     v.0.3.0.  Julia v.0.2.x is no more supported.
   * ESS[R]: Running R with 'gdb' debugger now works as expected
   * iESS: Inferior ESS buffers are now derived from 'comint-mode'
   * ESS[R]: 'ess-execute-screen-options' uses correct screen width in
     terminal sessions
   * ESS: 'ess-build-tags-for-directory' works when no TAGS file name
     was provided
   * ESS: 'ess-offset-statement-continued' is now respected everywhere
     except inside of the 'if' test condition.
   * ESS: New variable 'ess-offset-statement-first-continued' for
     indentation of the first line in multiline statements.
   * ESSR: Starting ',' in multiline statements indentation is now
     ignored to achieve a more pleasant alignment.
   * ESSR: Improved behavior of 'RET' in roxygen blocks.
   * ESS[R]: command cleaning with 'C-u C-u C-y' was broken with lines
     containing " + "
   * ESS[R]: fixed "empty watch window bug"
   * ESS[R]: don't ask for help location on ac-quick-help (request of
     github #81)
   * ESS[R]: "importClassesFrom" and "importMethodsFrom" were added to
     the list of two-parameter roxygen commands
   * ESS[R]: fix vignetes display and hyperlinks (were broken in
     13.09-1)
   * ESS[Julia]: recognize function names ending with !
   * ESS[Julia]: fix indentation of "for" comprehension syntax within
     brackets.

   Changes / Selected Bug Fixes in 13.09-1:
   * ess-remote and TRAMP: R support code is now downloaded in binary
     form instead of being injected from local machine.  The R code is
     stored in '~/.config/ESSR/' directory on the remote machine
   * TRAMP: PAGER environment variable is now correctly set to
     'inferior-ess-pager'
   * retrieval of help topics on remote machines is fixed
   * org-babel: source references of R code executed from org files
     correctly point to source references in original org files (version
     8.2.1 or higher of org-mode is required for this feature)
   * 'ess-execute' is now bound to 'C-c C-e C-e' in 'ess-extra-map'.
   * completion works again in 'ess-execute'
   * ESS[R]: 'head' and 'tail' methods were replaced by 'htsummary' in
     'ess-R-describe-object-at-point-commands'
   * ESS[roxygen]: evaluation commands now work in roxygen blocks.
     Leading comments are automatically removed before the evaluation
   * ESS[transcript]: 'Clean Region' now works with multiline
     statements; 'ess-transcript-clean-region' etc.  correctly treat
     multiline statements, i.e., no longer forgets the lines typically
     preceded by '+'
   * ESS[SAS]: Three features/fixes with special thanks to Matthew
     Fidler https://github.com/emacs-ess/ESS/pulls/mlf176f2
     (https://github.com/emacs-ess/ESS/pulls/mlf176f2).  Turn on SAS log
     mode when appropriate.  Indent comments and CARDS statement more
     appropriately.
   * ESS[SAS]: 'ess-sas-edit-keys-toggle' default returns to 'nil'
   * ESS[R]: support for 'prettify-symbols-mode': contribution from
     Rudiger Sonderfeld <https://github.com/emacs-ess/ESS/pull/65>
   * ESS[SWV]: knitr now evaluates in the current frame
   * ESS[developer]: ess-developer doesn't kill open DESCRIPTION files
     anymore
   * ESS[roxygen]: 'ess-roxy-preview-HTML' is now on 'C-c C-o C-w' and
     'ess-roxy-preview-text' is now on 'C-c C-o C-t'
   * ESS: installation with 'make install' was simplified and should
     work out of the box on most *nix systems
   * ESS installation instructions simplified
   * fixed font-lock bug introduced in 13.09 that was causing very slow
     process output

   Changes/New Features in 13.09:
   * font-lock in process buffers doesn't "spill" over prompts.  Missing
     closing string delimiters should not cause wrong fontification of
     the following command input.
   * ESS[julia]: full features M-TAB completion and auto-complete
     support, which now works for modules, structures and data types.
   * ESS[julia]: a much better eldoc showing arguments of methods and
     data type constructors
   * ESS-developer:
        - ESS-developer work-flow pattern has been streamlined:
          ESS-developer is now automatically activated on per-file basis
          if the file is part of a developed package
          'ess-developer-packages'.  The old behavior (activation on
          per-process basis) is still available on 'M-x ess-developer'
          in a process buffer.
        - integration with 'devtools' package.  New command
          'ess-developer-load-package' calls 'load_all' on the package
          containing current file.  'ess-developer-add-package' now
          offers IDO menu completions with available loading methods,
          currently 'library', and 'load_all'.  Loading command can be
          customized with 'ess-developer-load-on-add-commands'.
   * 'TAB' now indents region if region is active (a contribution of
     Matthew Fidler in pull #41)
   * 'M-x ess-version' now reports full loading path and recognizes git
     and ELPA versions.
   * warning and error keyword are now highlighted with
     'font-lock-warning-face' as they should be, (for quite some time
     these keywords have been hijacked by compilation mode
     fontification).
   * eldoc: Eldoc now recognizes multiple processes.  If current process
     is busy, or current buffer is not associated with a process, eldoc
     picks its completions from the first available free process.
   * org-babel: evaluation is now org-friendly
   * help: new help buffers now try to reuse ess-help buffers.  This
     behavior is controlled by 'ess-help-reuse-window' custom variable.
   * help: ?foo pops IDO menu on multiple help files (so far it worked
     only for 'C-c C-v')
   * remote evaluation is considerably faster now on slow connections
   * ESS[R] tracebug R source references regular expressions are
     (mostly) language agnostic.
   * 'ess-function-call-face' inherits from
     'font-lock-function-name-face' rather than
     'font-lock-builtin-face'.
   * 'ess-inject-source' now accepts 'function-and-buffer' option.
   * Documentation: The "New Features" section (and 'NEWS') now
     represent recent changes: within the last year or so.  All changes
     can be found in the new news.html (news.html) (or 'NEWS' and
     'ONEWS').
   * ESS[R] 'ess-rep-regexp' should no longer inf.loop (rarely!), and
     hence 'M-x ess-fix-miscellaneous' should neither.

   Changes/New Features in 13.05:
   * ESS[gretl]: Support for 'gretl' (both editing and sub-process
     interaction).  A contribution of Ahmadou Dicko.
   * ESS: process output display is 4-10 times faster due to new caching
     and only occasional emacs re-display (for the moment this
     functionality is available only when 'ess-tracebug' is active).
   * ESS: 'C-c `' is now bound to 'ess-show-traceback' and 'C-c ~' is
     bound to 'ess-show-call-stack'.
   * ESS[R]: ESS stores function in 'ESSR' environment to avoid kludging
     users' global environment and accidental deletion.
   * ESS[R]: new variable 'ess-swv-processing-command' to control
     weaving and tangling.
   * ESS[R]: 'ess-default-style' has been changed (from 'DEFAULT') to
     'RRR'.  Use something like '(setq ess-default-style 'DEFAULT)' or
     '(setq ess-indent-level 2)' in your '~/.emacs' equivalent _before_
     loading ESS, if you do not like this new "incompatible" default
     style.
   * ESS[julia]: ESS stores its functions in 'ESS' module.
   * ESS[julia]: Eldoc is now supported in julia modes
   * ESS[julia]: Adjusted error reference detection and interactive help
     to julia internal changes
   * ESS[R]: 'ess-use-tracebug''s default has been changed to 't'.  Set
     it to nil if you want to keep the previous behavior.
   * ESS[tracebug]: Electric debug keys have been removed [breaking
     change] The functionality was replaced with 'ess-debug-minor-mode'
     and 'ess-debug-minor-mode-map'.
   * ESS[tracebug]: 'ess-tracebug-map' is an alias to 'ess-dev-map' 'C-c
     C-t'.
   * ESS[tracebug]: 'ess-bp-toggle-state' ('C-c C-t o') can now be used
     during the debug session to toggle breakpoints on the fly
     (suggestion by Ross Boylan).
   * ESS[tracebug]: 'ess-debug-flag-for-debugging' and
     'ess-debug-unflag-for-debugging' work correctly from the debugging
     contexts.  These commands also recognize non-exported functions for
     the packages listed in 'ess-developer-packages' ('C-c C-t C-a').

   * ESS[R]: Eldoc (activated by 'ess-use-eldoc') has become more
     sophisticated, and hence also more intruding in the interface
     between the Statistics softare, e.g., R, and the user.

     Note that you can turn off ElDoc, by placing '(setq ess-use-eldoc
     nil)' in your '~/.emacs' file, prior to loading ESS,

   * ESS[SAS]: long over-looked 'SAS-mode-hook' appears!
   * ESS[SAS]: 'ess-sas-edit-keys-toggle' now defaults to 't' since
     'sas-indent-line' is still broken, i.e.  'TAB' is now bound to
     'ess-sas-tab-to-tab-stop' by default

   Changes/Bug Fixes in 12.09-2:
   * ESS: new 'ess-switch-to-end-of-proc-buffer' variable that controls
     whether 'C-c C-z' switches to the end of process buffer.  The
     default is 't'.  You can use prefix argument to 'C-c C-z' to toggle
     this variable.
   * ESS: fix in 'ess-eval-linewise' that was causing emacs to hang
     during R debugging with 'ess-eval-visibly' equal to 't'.
   * ESS: fix in 'ess-eval-linewise' that was causing emacs to recenter
     the prompt in visible window
   * ESS[tracebug]: A better handling of "Selection" prompts and debug
     related singlekey commands.
   * ESS: fix a bug in 'ess-switch-process' that was causing '*new*'
     selection to fail.
   * ESS[R]: Solve missing 'ess-local-process-name' bug in R-dired.
   * ESS[SWV]: 'ess-swv-PDF' doesn't ask for a command to run if there
     is only one command in 'ess-swv-pdflatex-commands'.
   * ESS[SWV]: 'ess-swv-weave' gained an universal argument to allow for
     an interactive choice between available weavers (sweave, knitr).
   * ESS: 'ess-eval-*-and-step' functions go to next empty line at eob,
     instead of staying at the last line.

   Changes/New Features in 12.09-1:
   * ESS _Breaking Changes in Keys_:

        - New keymaps: 'ess-doc-map' bound to 'C-c C-d'; 'ess-extra-map'
          bound to 'C-c C-e'; 'ess-dump-object-into-edit-buffer' was
          moved on 'C-c C-e C-d'
        - roxygen map was moved on 'C-c C-o' and 'ess-roxy-update-entry'
          now resides on 'C-c C-o C-o'
        - ess-handy-commands is not bound anymore
        - 'ess-dev-map' (including 'ess-tracebug' and 'ess-developer')
          moved on 'C-c C-t'
        - 'C-c C-y' is deprecated in favor of 'C-c C-z C-z'
   * ESS[R] new command 'ess-describe-object-at-point' bound to 'C-c C-d
     C-e' (repeat 'C-e' or 'e' to cycle).  It was inspired by Erik
     Iverson's 'ess-R-object-tooltip'.  Customize
     'ess-describe-at-point-method' to use tooltip instead of an
     electric buffer.
   * ESS: New command 'ess-build-tags-for-directory' bound to 'C-c C-e
     C-t' for building dialect specific tag tables.  After building tags
     use 'M-.' to navigate to function and objects definitions.  By
     default 'C-c C-e C-t' builds tags based on imenu regular
     expressions and also include other common languages '.c, .o, .cpp'
     etc.  But it relies on external 'find' and 'etags' commands.  If
     'ess-build-tags-command' is defined (for 'R'), the inferior process
     is asked to build tags instead.
   * ESS: 'ess-switch-process' offers '*new*' alternative to start a new
     process instead of switching to one of the currently running
     processes.
   * ESS: Switching between processes ('C-c C-s') uses buffer names
     instead of the internal process names.  Use 'M-x rename-buffer'
     command to conveniently rename your process buffers.
   * ESS: Process buffers can be automatically named on process creation
     according to user specified scheme.  Default schemes are *proc*,
     *proc:dir* and *proc:abbr-long-dir* where 'proc' stands for the
     internal process name and 'dir' stands for the directory where the
     process was started in.  The default is *proc*.  For customization
     see 'ess-gen-proc-buffer-name-function'.
   * ESS: 'ess-eval-visibly-p' is deprecated in favor of
     'ess-eval-visibly'.
   * ESS: New evaluation pattern 'nowait'.  In addition to old 'nil' and
     't' values, 'ess-eval-visibly' accepts 'nowait' for a visible
     evaluation with no waiting for the process.  See 'ess-eval-visibly'
     for details on evaluation patterns.
   * ESS: New "Process" menu entry with process related commands and
     configuration
   * iESS: Process buffer is now automatically shown on errors
   * ESS: New 'ess-switch-to-inferior-or-script-buffer' command bound to
     'C-c C-z' in both script and process buffers.  If invoked form
     process buffer it switches to the most recent buffer of the same
     dialect.  It is a single key command.
   * ESSR-help: On multiple help pages with the same name, 'C-c C-v' now
     asks for user resolution directly in emacs.
   * ESS[R] ess-roxy: new variable 'ess-roxy-re' for fontification of
     cases where the number of leading '#' differs from 'ess-roxy-str'.
   * ESS[R] Eldoc was considerably enhanced.  It now finds hidden
     default S3 methods and displays non-default methods' arguments
     after trailing ||.
   * ESS[R]: New 'ess-display-demos' command bound to 'C-c C-d o' and
     'C-c C-d C-o'
   * ESS: New 'ess-help-web-search' command bound to 'C-c C-d w' and
     'C-c C-d C-w' to facilitate interactive search of web resources.
     Implemented for 'R', 'Stata' and 'Julia'.  See also
     'ess-help-web-search-command'.
   * ESS: ess-pdf-viewer-pref accepts now command line arguments
   * ESS[Rnw]: Add knitr support.  Customize 'ess-swv-processor' for the
     default processor.
   * ESS[Rnw]: More thorough renaming of remaining 'noweb-*' to
     'ess-noweb-*'.
   * ESS[Rnw] new commands 'ess-eval-chunk-and-step' and
     'ess-eval-chunk' bound to 'M-n C-c' and 'M-n C-M-x' to mirror
     standard ess commands in C-c map.
   * ESS[R] Auto-completion: new variable 'ess-ac-R-argument-suffix' to
     customize the insertion of trailing "=".  Defaults to " = ".
   * ESS[Julia]: Added index, apropos and web-search to julia.
   * ESS help: More evaluation commands were added to ess-help mode
     ('C-c C-c', 'C-M-x' etc)

   Bug Fixes in 12.09-1:
   * iESShelp: Multiple help pages with the same name are properly
     handled on 'C-c C-v'
   * iESSremote: Evaluation with ESS remote no longer freezes emacs.
   * iESS: 'comint-previous-prompt' 'C-c C-p' no longer stops on
     secondary prompt "+".
   * iESS[R], iESS(Sqpe) [S] on Windows: The 'options("editor")' is now
     initialized to 'emacsclient' instead of the previous 'gnuclient'.
     The user may need to add the line '(server-start)' to the emacs
     initialization file.  'emacsclient' has been included with emacs
     since GNU Emacs 22.1.
   * ESS[Rnw] Fixed "connection to R" bug (in 12.09 only).
   * ESS[Rnw] Explicit 'ess-swv-stangle' and 'ess-swv-sweave' functions.
   * ESS[Rnw] Fixed completion and smart underscore problems cause by
     unmatched "\"'
   * ESS[R] is more careful with the 'R' code injection.  It now happens
     only once at the start of the session.
   * ESS[R]: Fixed auto-scrolling the comint buffer on evaluation.
   * ESS[Julia]: Solve several indentation and word navigation problems.
   * ESS[Julia]: Help system works again.

   Changes/New Features in 12.09:

   * Due to XEmacs lacking some features that ESS requires, ESS support
     of XEmacs ends with ESS 12.04-4.  This decision will be re-visited
     in the future as XEmacs continues to sync with GNU Emacs.

   * ESS[R]: On Windows, there is now a new customizable variable
     (currently called 'ess-directory-containing-R') to tell ESS where
     to look for the 'Rterm.exe' executables.  The name of the variable
     and the values it can take are both in beta and subject to change.
     Prior to this variable, ESS searched only in the default
     installation directory.  Setting this variable now tells ESS how to
     find 'Rterm.exe' executables when they are installed somewhere
     else.

   * ESS[julia]: _new_ mode for editing julia code ('*.jl').  Start with
     'M-x julia'.

     Full interaction interface, imenu and basic error referencing are
     available.

   * ESS[R] noweb: 'noweb-mode' and 'noweb-font-lock-mode' have been
     renamed to 'ess-noweb-mode' and 'ess-noweb-font-lock-mode' to avoid
     conflicts with the "real" 'noweb-mode'.

   * ESS[R] noweb: The long standing font-lock bug has been solved in
     'ess-noweb' interface.

   * ESS: Basic evaluation keys are now bound to 'ess-eval-region-*-'
     functions:

        - 'C-M-x' is bound to 'ess-eval-region-or-function-or-paragraph'
        - 'C-c C-c' is bound to
          'ess-eval-region-or-function-or-paragraph-and-step'
        - 'C-RET' is bound to 'ess-eval-region-or-line-and-step'

     Each of these functions first evaluates the region whenever the
     region is active.

   * ESS: 'C-M-a'/'C-M-e' now step to beginning/end of paragraph if no
     function has been detected.

   * ESS: 'ess-eval-*-and-step' family of functions are now smarter, and
     don't step to end of buffer or end of chunk code ('@') when at the
     end of the code.

   * ESS: 'ess-handy-commands' function is bound to 'C-c h'

   * ESS: ESS is now _blinking_ the evaluated region.  Set
     'ess-blink-region' to nil to deactivate; 'ess-blink-delay' gives
     the duration of the blink.  Evaluated region is "blinked" in
     'highlight' face.

   * ESS[R-help] New key 'a' for "apropos()" in help buffers.  Also
     available through 'C-c h'.

   * ESS[R-help] All R commands of type foo?bar and foo??bar are
     recognized and redirected into appropriate *ESS-help* buffers.

   * ESS[R]: New customization interface for _font-lock_.

     ESS font-lock operates with predefined keywords.  Default keywords
     are listed in 'ess-R-font-lock-keywords' and
     'inferior-R-font-lock-keywords', which see.  The user can easily
     customize those by adding new keywords.  These variables can also
     be interactively accessed and saved through 'ESS/Font-lock'
     submenu.

     Several new fontification keywords have been added.  Most notably
     the keywords for highlighting of function calls, numbers and
     operators.

   * ESS[R]: auto-complete is now activated by default whenever
     auto-complete package is detected.  Set 'ess-use-auto-complete' to
     nil to deactivate.
   * ESS[R]: R AC sources are no longer auto-starting at 0 characters
     but at the default 'ac-auto-start' characters.
   * ESS no longer redefines default ac-sources, but only appends
     'ac-source-filename' to it.
   * ESS: 'ac-source-R' now concatenates " = " to function arguments.

   * ESS: Menus for ESS and iESS have been reorganized and enriched with
     _Tracebug_ and _Developer_ submenus.

   * ESS[R]: 'ess-developer' and 'ess-tracebug' commands are available
     by default in 'ess-dev-map' which is bound to 'C-c d' in ESS and
     iESS maps.

   * ESS[R]: 'eldoc' truncates long lines whenever
     'eldoc-echo-area-use-multiline-p' is non-nil (the default).  Set
     this variable to t if you insist on multiline eldoc.  See also
     'ess-eldoc-abbreviation-style'.

   * ESS[R]: completion code pre-caches arguments of heavy generics such
     as 'plot' and 'print' to eliminated the undesirable delay on first
     request.

   * iESS: Prompts in inferior buffers are now highlighted uniformly
     with 'comint-highlight-prompt' face.

   * ESS[R]: R process no longer wait for the completion of input in
     inferior buffer.  Thus, long running commands like 'Sys.sleep(5)'
     no longer stall emacs.

   * ESS: [R, S, Stata, Julia] have specialized 'ess-X-post-run-hook's,
     which are run at the end of subprocess initialization.

   * ESS[Stata]: All interactive evaluation commands work as expected.
     On-line comments are removed before the evaluation and multiline
     comments are skipped on 'C-c C-c' and other interactive commands.

   * ESS no longer auto-connects to a subprocess with a different
     dialect than the current buffer's one.

   * ESS: 'ess-arg-function-offset-new-line' is now a list for all the
     ESS indentation styles, which results in the following indentation
     after an open "(":

       a <- some.function(other.function(
          arg1,
          arg2)

   * ESS[SAS]: Improved MS RTF support for GNU Emacs; try
     'ess-sas-rtf-portrait' and 'ess-sas-rtf-landscape'.

   Changes/Bug Fixes in 12.04-3:
   * ESS: basic support for package.el compatibility
   * ESS[R]: correct indentation of & and | continuation lines
   * 'M-x ess-version' shows the svn revision even after 'make install'
   * ESS[SAS]: improved XEmacs support
   * iESS[R]: better finding of previous prompt
   * ESS[Stata]: adjusted prompt for mata mode
   * ESS[R]: resolved name clashes with cl.el
   * ESS[R]: removed dependence on obsolete package assoc
   * New 'make' target 'lisp', to build the lisp-only part, i.e., not
     building the docs.

   Changes/New Features in 12.04-1:
   * iESS[Stata]: New interactive help invocation.
   * iESS[Stata]: New custom variable 'inferior-STA-start-file'.
   * iESS[Stata]: 'inferior-STA-program-name' is now "stata" and can be
     customized.
   * ESS[Stata] New sections in stata help files Syntax('s-S'),
     Remarks('r'), Title('t').

   Bug Fixes in 12.04-1:
   * ESS[R]: Better 'ess-tracebug' error handling.
   * ESS[R]: Corrected 'ess-eldoc' help string filtering and improved
     argument caching.
   * ESS[R]: Indentation of non-block if/else/for/while lines fixed.
   * 'M-x ess-version' should work better.
   * ESS: Filename completion now again works inside strings.
   * iESS[Stata]: Fixed prompt detection issue.
   * ESS[Rd]: R is autostarted also from here, when needed.

   Changes/New Features in 12.04:
   * ESS: Reverting new behavior of 12.03, 'TAB' in 'ess-mode' no longer
     completes by default.  If you want smart 'TAB' completion in R and
     S scripts, similarly to iESS behavior, set the variable
     'ess-tab-complete-in-script' to 't'.  Also see
     'ess-first-tab-never-complete' for how to customize where first
     'TAB' is allowed to complete.
   * ESS: completion is consistently bound to 'M-TAB' (aka 'M-C-i') in
     both Emacs23 and Emacs24.
   * ESS: The variable 'ess-arg-function-offset-new-line' introduced in
     ESS(12.03) now accepts a list with the first element a number to
     indicate that the offset should be computed from the indent of the
     previous line.  For example setting it to '(2) results in:

       a <- some.function(
         arg1,
         arg2)

   Changes/New Features in 12.03:
   * ESS indentation: new offset variable
     'ess-arg-function-offset-new-line' controlling for the indentation
     of lines immediately following open '('.  This is useful to shift
     backwards function arguments after a long function call expression:

       a <- some.function(
              arg1,
              arg2)

     instead of the old

       a <- some.function(
                          arg1,
                          arg2)

     If '(' is not followed by new line the behavior is unchanged:

       a <- some.function(arg1,
                          arg2)

     This variable should be set as part of indentation style lists, or
     in ess-mode hook.
   * ESS[R]: 'C-c .' sets (indentation) style.
   * ESS: In ESS buffers 'yank'('C-y') command accepts double argument
     'C-u C-u' to paste commands only.  It deletes any lines not
     beginning with a prompt, and then removes the prompt from those
     lines that remain.  Useful to paste code from emails,
     documentation, inferior ESS buffers or transcript files.
   * Documentation: ESS user manual has been rearranged and completed
     with several new chapters and sections to reflect newly added
     features ("Completion", "Developing with ESS", "ESS tracebug", "ESS
     developer", "ESS ElDoc", "IDO Completion" and "Evaluating Code")
   * RefCard: Reference card was updated to include new features.
   * Eldoc: Eldoc was rewritten and is activated by default.  See
     'ess-use-eldoc', 'ess-eldoc-show-on-symbol',
     'ess-eldoc-abbreviation-style' variables for how to change the
     default behavior.  _Note:_ 'skeleton-pair-insert-maybe' prohibits
     eldoc display, on '(' insertion.
   * ESS[R]: Eldoc shows arguments of a generic function whenever found.
   * ESS: 'TAB' in 'ess-mode' now indents and completes, if there is
     nothing to indent.  Set 'ess-first-tab-never-completes-p' to 't' to
     make 'TAB' never complete on first invocation.  Completion
     mechanism is similar to the completion in the 'inferior-ess-mode' -
     a filename expansion is tried, if not found ESS completes the
     symbol by querying the process.
   * ESS for emacs version 24 or higher: ESS is fully compatible with
     the emacs 24 completion scheme, i.e.  all the completion is done by
     'completion-at-point'.  Also in accordance with emacs conventions,
     ESS doesn't bind 'M-TAB' for emacs 24 or higher.  'M-TAB' calls the
     default 'complete-symbol'.

   * ESS[R]: Out of the box integration with 'Auto Completion' mode
     http://cx4a.org/software/auto-complete
     (http://cx4a.org/software/auto-complete) .  Three AC sources
     'ac-source-R-args', 'ac-source-R-objects' and 'ac-source-R' are
     provided.  The last one combines the previous two and makes them
     play nicely together.  Set 'ess-use-auto-complete' to 't' to start
     using it.  Refer to documentation string of 'ac-use-auto-complete'
     for further information.
   * ESS[R]: New unified and fast argument completion system, comprised
     of 'ess-funname.start', 'ess-function-arguments',
     'ess-get-object-at-point'.  Eldoc and auto-completion integration
     are using this system.
   * ESS: 'ess-switch-to-end-of-ESS'('C-c C-z'), and
     'ess-switch-to-ESS'('C-c C-y'): Automatically start the process
     whenever needed.
   * ESS[R]: 'roxy' knows about previewing text version of the
     documentation.  Bound to 'C-c C-e t'.
   * ESS[R]: Solved the "nil filename" bug in roxygen support.
   * ESS[R]: 'ess-tracebug' is now part of ESS:

     New Features:

        - Source injection: Tracebug now can inject source references on
          the fly during code evaluation, i.e.  you don't have to source
          your file, but just evaluate your code in normal fashion.
          Variable 'ess-tracebug-inject-source-p' controls this behavior
          - if t, always inject source reference, if ''function', inject
          only for functions (this is the default), if 'nil', never
          inject.

          During the source injection the value of 'ess-eval-visibly' is
          ignored.
        - Org-mode support: Visual debugger is now aware of the
          temporary org source editing buffer ('C-c '') and jumps
          through this buffers if still alive, or in original org buffer
          otherwise.
        - New keys in watch mode: '?' and 'd'
        - Two new hooks: ess-tracebug-enter-hook and
          ess-tracebug-exit-hook

   * ESS[R]: New package 'ess-developer' to evaluate 'R' code directly
     in the package environment and namespace.  It can be toggled on and
     off with 'C-c d t'.  When 'ess-developer' is on all ESS evaluation
     commands are redefined to evaluate code in appropriate
     environments.  Add package names to the list of your development
     packages with 'C-d a', and remove with 'C-d r'.  Source the current
     file with 'C-d s'.Evaluation function which depend on
     '`ess-eval-region'' ask for the package to source the code into,
     'ess-eval-function' and alternatives search for the function name
     in the development packages' environment and namespace and insert
     the definition accordingly.  See the documentation section
     "Developing with ESS/ESS developer" for more details.

   * ESS[R] help system:

     New Features:

        - 'q' quits window instead of calling
          'ess-switch-to-end-of-ESS'.  This is consistent with emacs
          behavior help and other special buffers (_breaking change_).
        - 'k' kills window without asking for the name (pointed by Sam
          Steingold)
        - Help map inherits from 'special-mode-map' as sugested by Sam
          Steingold.
        - Package index: new function 'ess-display-index' bound to 'i'
          in help mode map.
        - Package vignettes: new function 'ess-display-vignettes' bound
          to 'v' in help mode map.
        - Display help in HTML browser: new function
          'ess-display-help-in-browser' bound to 'w' in help mode map.
          It depends on 'R''s 'browser' option.
        - New custom variable 'ess-help-pop-to-buffer': if non-nil ESS
          help buffers are given focus on display.  The default is 't'
          (_breaking change_).
        - New menu entries for the above functions.
        - Bogus help buffers are no longer generated by default, i.e.
          buffers of the form "No documentation for 'foo' in specified
          packages and libraries: you could try '??foo' ".
          'ess-help-kill-bogus-buffers' now defaults to 't'.  Beware,
          there may be instances where the default is unsatisfactory
          such as debugging and/or during R development.  Thanks to Ross
          Boylan for making the suggestion, Sam Steingold for reminding
          us of this variable and Martin Maechler for the warning.
   * ESS now uses 'IDO' completing read functionality for all the
     interactive requests.  It uses ido completion mechanism whenever
     available, and falls back on classical completing-read otherwise.
     You can set 'ess-use-ido' to nil if you don't want the IDO
     completion.  See the documentation string of 'ess-use-ido' for more
     information about 'IDO' and ESS configuration.

   * ESS[S]: "','" is bound to ess-smart-comma: If comma is invoked at
     the process marker of an ESS inferior buffer, request and execute a
     command from '`ess-handy-commands'' list.  If
     'ess-R-smart-operators' is t '`ess-smart-comma' also inserts " "
     after comma.
   * ESS[S], notably 'R': Variable '`ess-handy-commands'' stores an
     alist of useful commands which are called by 'ess-smart-comma' in
     the inferior buffer.

     Currently containing:

     change-directory
          'ess-change-directory'
     help-index
          'ess-display-index'
     help-object
          'ess-display-help-on-object'
     vignettes
          'ess-display-vignettes'
     objects[ls]
          'ess-execute-objects'
     search
          'ess-execute-search'
     set-width
          'ess-execute-screen-options'
     install.packages
          'ess-install.packages'
     library
          'ess-library'
     setRepos
          'ess-setRepositories'
     sos
          'ess-sos'

     Handy commands: 'ess-library', 'ess-install.packages', etc - ask
     for item with completion and execute the correspond command.
     'ess-sos' is a interface to 'findFn' function in package 'sos'.  If
     package 'sos' is not found, ask user for interactive install.

   * ESS: New dynamic mode line indicator: Process status is
     automatically reflected in all mode-lines of associated with the
     process buffers.  Particularly useful for displaying debug status
     of 'ess-tracebug' and developer status of 'ess-developer' in all
     associated buffers.

   * ESS: New 'ess-completing-read' mechanism: ESS uses 'ido'
     completions whenever possible.  Variable 'ess-use-ido' controls
     whether to use ido completion or not.  Active by default.

   * ESS now supports comint fields for output and input detection.
     This feature is not used by default, but might be useful in the
     future.

   * ESS[S]: New custom variable 'inferior-ess-S-prompt' to customize
     prompt detection regular expression in the inferior ESS buffers.
     You can customize this variable to enhance comint navigation
     ('comint-previous-prompt' and 'comint-next-prompt') the inferior
     buffers.

   * ESS[R]: Internal 'R' completion retrieval
     ('ess-R-complete-object-name') was rewritten and is faster now.

   * ESS is using process plist to store process specific variables, as
     opposed to buffer local variables as it was using before.  The use
     of buffer local variables to store process variables is
     discouraged.

   * ESS: new functions to manipulate process plists: 'ess-process-get'
     and 'ess-process-set'.

   * ESS: Internal process waiting mechanism was completely rewritten.
     ESS no more relies on prompt regular expressions for the prompt
     detection.  The only requirement on the primary process prompt is
     to end in '> '.  This could be overwritten by setting
     'inferor-ess-primary-prompt'.

   * ESS[S], notably 'R': Saved command history: ESS-HISTORY-FILE now
     accepts 't' (default), 'nil', or a file name.  By setting it to
     'nil' no command line history is saved anymore.
     ESS-HISTORY-DIRECTORY now allows to have the history all saved in
     one "central" file.
   * ESS[R]: more Roxygen improvements.
   * ESS[R]: 'C-c .' to set (indentation) style.

   * ESS[R]: Functions with non-standard names (for example
     'aaa-bbb:cc') are properly handled by font-lock and evaluation
     routines.
   * ESS[R]:Several regexp bugs (described in etc/R-ESS-bugs.el) were
     fixed in 'ess-get-words-from-vector' and 'ess-command'.

