@c This is part of the Emacs manual.
-@c Copyright (C) 2002, 2004, 2005 Free Software Foundation, Inc.
+@c Copyright (C) 2005, 2006 Free Software Foundation, Inc.
@c See file emacs.texi for copying conditions.
@node Antinews, Mac OS, X Resources, Top
-@appendix Emacs 21.4 Antinews
+@appendix Emacs 21 Antinews
For those users who live backwards in time, here is information about
downgrading to Emacs version 21.4. We hope you will enjoy the greater
-simplicity that results from the absence of many newer features.
+simplicity that results from the absence of many Emacs @value{EMACSVER}
+features.
@itemize @bullet
+
@item
-The input methods for Emacs are included in a separate distribution
-called ``Leim''. To use them, you must extract the Leim tar file on
-top of the Emacs distribution, into the same directory, before you
-build Emacs.
+The buffer position and line number are now displayed at the end of
+the mode line, where they can be more easily seen.
@item
-The file position and line number information is now at the end
-of the mode line.
+The mode line of the selected window is no longer displayed with a
+special face. All mode lines are created equal. Meanwhile, you can
+use the variable @code{mode-line-inverse-video} to control whether
+mode lines are highlighted at all---@code{nil} means don't highlight
+them.
@item
-When a file is managed with version control, the command @kbd{C-x C-q}
-(whose general meaning is to make a buffer read-only or writable) now
-does so by checking the file in or out. Checking the file out makes
-the buffer writable; checking it in makes the buffer read-only (at
-least with RCS).
+Clicking on a link with the left mouse button (@kbd{mouse-1}) will
+always set point at the position clicked, instead of following the
+link. If you want to follow the link, use the middle mouse button
+(@kbd{mouse-2}).
-You can still use @kbd{C-x v v} to do these operations if you wish;
-its meaning is unchanged. If you want to control the buffer's
-read-only flag without performing any version control operation,
-use @kbd{M-x toggle-read-only}.
+@item
+Emacs is tired of X droppings. If you drop a file or a piece of text
+onto an Emacs window, nothing will happen.
@item
-Filesets are not supported.
+On an xterm, even if you enable Xterm Mouse mode, Emacs provides a
+more convincing simulation of a text terminal by not responding to
+mouse clicks on the mode line, header line, or display margin.
@item
-For simplicity, windows always have fringes. We wouldn't want
-to in-fringe anyone's windows. Likewise, horizontal scrolling
-always works the same automatic way.
+For simplicity, windows always have fringes. We wouldn't want to
+in-fringe anyone's windows. Likewise, horizontal scrolling always
+works in the same automatic way.
@item
-When you are logged in as root, all files now give you writable
-buffers in Emacs reflecting the fact that you can write any files.
+The horizontal-bar cursor shape has been removed.
@item
-Unicode support and unification between Latin-@var{n} character
-sets have been removed. Cutting and pasting X selections does not
-support ``extended segments'' so there are certain coding systems
-it cannot handle.
+If command line arguments are given, Emacs will not display a splash
+screen, so that you can immediately get on with your editing. The
+command-line option @samp{--no-splash} is therefore obsolete, and has
+been removed.
@item
-@kbd{C-w} in an incremental search always grabs an entire word
-into the search string. More precisely, it grabs text through
-the next end of a word.
+The command line options @samp{--color}, @samp{--fullwidth},
+@samp{--fullheight}, @samp{--fullscreen}, @samp{--no-blinking-cursor},
+@samp{--no-desktop}, and @samp{-Q} have also been removed.
@item
-Yanking now preserves all text properties that were in the killed
-text. The variable @code{yank-excluded-properties} has no meaning.
+The @samp{--geometry} option applies only to the initial frame, and
+the @samp{-f} option will not read arguments for interactive
+functions.
@item
-Occur mode, Info mode, and Comint-derived modes now control
-fontification in their own way, and @kbd{M-x font-lock-mode}
-has nothing to do with it. To control fontification in Info
-mode, use the variable @code{Info-fontify}.
+We have standardized on one location for the user init file: the file
+named @file{.emacs} in your home directory. Emacs will not look for
+the init file in @file{~/.emacs.d/init.el}. Similarly, don't try
+putting @file{.emacs_SHELL} in @file{~/.emacs.d}; Emacs won't find it.
@item
-In Dired's @kbd{!} command, @samp{*} and @samp{?} now
-cause substitution of the file names wherever they appear---not
-only when they are surrounded by whitespace.
+Emacs will not read @file{~/.abbrev_defs} automatically. If you want
+to load abbrev definitions from a file, you must always do so
+explicitly.
+
+@item
+When you are logged in as root, all files now give you writable
+buffers, reflecting the fact that you can write any files.
@item
-Minibuffer completion commands now always complete the entire
-minibuffer contents, just as if you had typed them at the end
-of the minibuffer, no matter where point is actually located.
+The maximum size of buffers and integer variables has been halved. On
+32-bit machines, the maximum buffer size is now 128 megabytes.
@item
An unquoted @samp{$} in a file name is now an error, if the following
the file name @file{foo$bar} would probably be an error. Meanwhile,
the @code{setenv} command does not expand @samp{$} at all.
+@item
+If a single command accumulates too much undo information, Emacs never
+discards it. If Emacs runs out of memory as a result, it will handle
+this by crashing.
+
+@item
+Many commands have been removed from the menus or rearranged.
+
+@item
+The @kbd{C-h} (help) subcommands have been rearranged---especially
+those that display specific files. Type @kbd{C-h C-h} to see a list
+of these commands; that will show you what is different.
+
+@item
+The @kbd{C-h v} and @kbd{C-h f} commands no longer show a hyperlink to
+the C source code, even if it is available. If you want to find the
+source code, grep for it.
+
+@item
+The apropos commands will not accept a list of words to match, in
+order to encourage you to be more specific. Also, the user option
+@code{apropos-sort-by-scores} has been removed.
+
+@item
+The minibuffer prompt is now displayed using the default face.
+The colon is enough to show you what part is the prompt.
+
+@item
+Minibuffer completion commands always complete the entire minibuffer
+contents, just as if you had typed them at the end of the minibuffer,
+no matter where point is actually located.
+
+@item
+The command @code{backward-kill-sexp} is now bound to @kbd{C-M-delete}
+and @kbd{C-M-backspace}. Be careful when using these key sequences!
+It may shut down your X server, or reboot your operating system.
+
@item
Commands to set the mark at a place away from point, including
@kbd{M-@@}, @kbd{M-h}, etc., don't do anything special when you repeat
them. In most cases, typing these commands multiple times is
-equivalent to using them once. @kbd{M-h} does not use its numeric
-argument.
+equivalent to typing them once. @kbd{M-h} ignores numeric arguments.
@item
-@kbd{C-@key{SPC} C-@key{SPC}} has no special meaning and neither does
-@kbd{C-u C-x C-x}.
+The user option @code{set-mark-command-repeat-pop} has been removed.
@item
-There is no horizontal-bar cursor.
+@kbd{C-@key{SPC} C-@key{SPC}} has no special meaning--it just sets the
+mark twice. Neither does @kbd{C-u C-x C-x}, which simply exchanges
+point and mark like @kbd{C-x C-x}.
@item
-The faces @code{minibuffer-prompt} and @code{mode-line-inactive}
-do not exist, and the features they control don't exist either.
+The function @code{sentence-end} has been eliminated in favor of a
+more straightforward approach: directly setting the variable
+@code{sentence-end}. For example, to end each sentence with a single
+space, use
+
+@lisp
+(setq sentence-end "[.?!][]\"')@}]*\\($\\|[ \t]\\)[ \t\n]*")
+@end lisp
@item
-The default value of @code{keyboard-coding-system} is always @code{nil}.
-Emacs does not set it based on your locale settings.
-If you want some other value, you must set it yourself.
+The variable @code{fill-nobreak-predicate} is no longer customizable,
+and it can only hold a single function.
@item
-SGML mode does not handle XML syntax, and does not have indentation support.
+Nobreak spaces and hyphens are displayed just like normal characters,
+and the user option @code{nobreak-char-display} has been removed.
@item
-The @kbd{C-h} subcommands have been rearranged---especially those that
-display specific files. Type @kbd{C-h C-h} to see a list of these
-commands; that will show you what is different.
+@kbd{C-w} in an incremental search always grabs an entire word
+into the search string. More precisely, it grabs text through
+the next end of a word.
@item
-Emacs does not read @file{~/.abbrev_defs} automatically; if you want
-to load abbrev definitions from a file, you must always do so
-explicitly.
+Yanking now preserves all text properties that were in the killed
+text. The variable @code{yank-excluded-properties} has been removed.
@item
-The @samp{--fullwidth}, @samp{--fullheight} and @samp{--fullscreen}
-command line options are not supported.
+Occur mode, Info mode, and Comint-derived modes now control
+fontification in their own way, and @kbd{M-x font-lock-mode} has
+nothing to do with it. To control fontification in Info mode, use the
+variable @code{Info-fontify}.
@item
-The @samp{--geometry} option now entirely applies only to the initial
-frame.
+The Grep package has been merged with Compilation mode. Many
+grep-specific commands and user options have thus been eliminated.
+Also, @kbd{M-x grep} never tries the GNU grep @samp{-H} option,
+and instead silently appends @file{/dev/null} to the command line.
@item
-Many commands have been removed from the menus or rearranged.
+In Dired's @kbd{!} command, @samp{*} and @samp{?} now
+cause substitution of the file names wherever they appear---not
+only when they are surrounded by whitespace.
+
+@item
+When a file is managed with version control, the command @kbd{C-x C-q}
+(whose general meaning is to make a buffer read-only or writable) now
+does so by checking the file in or out. Checking the file out makes
+the buffer writable; checking it in makes the buffer read-only.
+
+You can still use @kbd{C-x v v} to do these operations if you wish;
+its meaning is unchanged. If you want to control the buffer's
+read-only flag without performing any version control operation,
+use @kbd{M-x toggle-read-only}.
+
+@item
+SGML mode does not handle XML syntax, and does not have indentation
+support.
+
+@item
+Many Info mode commands have been removed. Incremental search in Info
+searches only the current node.
@item
Many @code{etags} features for customizing parsing using regexps
have been removed.
@item
-The CUA, ido, table, tramp, reveal, ruler-mode, and ibuffer packages
-have been removed. So has the spreadsheet, SES, and the algebraic
-calculator, Calc. (We distribute Calc separately.)
+The Emacs server now runs a small C program called @file{emacsserver},
+rather than trying to handle everything in Emacs Lisp. Now there can
+only be one Emacs server running at a time. The @code{server-mode}
+command and @code{server-name} user option have been eliminated.
+
+@item
+The @file{emacsclient} program no longer accepts the @samp{--eval} and
+@samp{--display} command line options.
+
+@item
+The command @code{quail-show-key}, for showing how to input a
+character, has been removed.
+
+@item
+The default value of @code{keyboard-coding-system} is always
+@code{nil}, regardless of your locale settings. If you want some
+other value, set it yourself.
+
+@item
+Unicode support and unification between Latin-@var{n} character sets
+have been removed. Cutting and pasting X selections does not support
+``extended segments'', so there are certain coding systems it cannot
+handle.
+
+@item
+The input methods for Emacs are included in a separate distribution
+called ``Leim''. To use this, you must extract the Leim tar file on
+top of the Emacs distribution, into the same directory, before you
+build Emacs.
+
+@item
+The following input methods have been eliminated: belarusian,
+bulgarian-bds, bulgarian-phonetic, chinese-sisheng, croatian, dutch,
+georgian, latin-alt-postfix, latin-postfix, latin-prefix,
+latvian-keyboard, lithuanian-numeric, lithuanian-keyboard,
+malayalam-inscript, rfc1345, russian-computer, sgml, slovenian,
+tamil-inscript ucs, ukrainian-computer, vietnamese-telex, and welsh.
+
+@item
+The following language environments have been eliminated: Belarusian,
+Bulgarian, Chinese-EUC-TW, Croatian, French, Georgian, Italian,
+Latin-6, Latin-7, Latvian, Lithuanian, Malayalam, Russian, Russian,
+Slovenian, Swedish, Tajik, Tamil, UTF-8, Ukrainian, Ukrainian, Welsh,
+and Windows-1255.
+
+@item
+The @code{code-pages} library, which contained various 8-bit coding
+systems, has been removed.
+
+@item
+The Kmacro package has been replaced with a simple and elegant
+keyboard macro system. Use @kbd{C-x (} to start a new keyboard macro,
+@kbd{C-x )} to end the macro, and @kbd{C-x e} to execute the last
+macro. Use @kbd{M-x name-last-kbd-macro} to name the most recently
+defined macro.
+
+@item
+The Calc, CUA, GDB-UI, Ibuffer, Ido, Password, Printing, Reveal,
+Ruler-mode, SES, Table, Tramp, and URL packages have been removed.
+The Benchmark, Cfengine, Conf, Dns, Flymake, Python, Thumbs, and
+Wdired modes have also been removed.
+
+@item
+The Emacs Lisp Reference Manual and the Introduction to Programming in
+Emacs Lisp are now distributed separately, not in the Emacs
+distribution.
+
+@item
+On MS Windows, there is no longer any support for tooltips, images,
+sound, different mouse pointer shapes, or pointing devices with more
+than 3 buttons. If you want these features, consider switching to
+another operating system. But even if you don't want these features,
+you should still switch---for freedom's sake.
@item
-The kmacro package has been removed. To start a keyboard macro you
-must use @kbd{C-x (}; to end one, @kbd{C-x )}; to execute the last
-one, @kbd{C-x e}.
+Emacs will not use Unicode for clipboard operations on MS Windows.
@item
To keep up with decreasing computer memory capacity and disk space, many