\f
* Changes in Emacs 23.1
+** If you set find-file-confirm-nonexistent-file to t, then C-x C-f
+requires confirmation before opening a non-existent file.
+
** If the gpm mouse server is running and t-mouse-mode enabled, Emacs uses a
Unix socket in a GNU/Linux console to talk to server, rather than faking events
using the client program mev. This C level approach provides mouse
recenter the visited source file. Its value can be a number (for example,
0 for top line, -1 for bottom line), or nil for no recentering.
+** The mode-line display a `@' if the default-directory for the current buffer
+is on a remote machine, or a hyphen otherwise.
+** The new command balance-window-area balances windows both vertically
+and horizontally.
\f
* Startup Changes in Emacs 23.1
** New command kill-matching-buffers kills buffers whose name matches a regexp.
+** Minibuffer changes:
+
+*** isearch started in the minibuffer searches in the minibuffer history.
+Reverse isearch commands (C-r, C-M-r) search in previous minibuffer
+history elements, and forward isearch commands (C-s, C-M-s) search in
+next history elements. When the reverse search reaches the first history
+element, it wraps to the last history element, and the forward search
+wraps to the first history element. When the search is terminated, the
+history element containing the search string becomes the current.
+
\f
* New Modes and Packages in Emacs 23.1
\f
* Changes in Specialized Modes and Packages in Emacs 23.1
+** compilation-auto-jump-to-first-error tells `compile' to jump to
+the first error encountered during compilations.
+
** In the `copyright' package, you can specify your copyright holders's names.
Only copyright lines with holders matching copyright-names-regexp will be
considered for update.
*** VC has some support for Mercurial (hg).
+*** VC has some support for Git.
+
** sgml-electric-tag-pair-mode lets you simultaneously edit matched tag pairs.
** BibTeX mode:
*** Command `bibtex-url' now allows multiple URLs per entry.
++++
+** Tramp
+
+*** New connection methods.
+The new methods "plinkx", "plink2", "psftp", "sftp" and "fish" have
+been introduced. There are also new so-called gateway methods
+"tunnel" and "socks".
+
+*** Multihop syntax has been removed.
+The pseudo-method "multi" has been removed. Instead of, multi hops
+can be specified by the new variable `tramp-default-proxies-alist'.
+
+*** More default settings.
+Default values can be set via the variables `tramp-default-user',
+`tramp-default-user-alist' and `tramp-default-host'.
+
+*** Connection information is cached.
+In order to reduce connection setup, information about used
+connections are kept persistent in a file. The name of this file is
+defined in the variable `tramp-persistency-file-name'.
+
+*** Control of remote processes.
+Running processes on a remote host can be controlled by settings in
+`tramp-remote-path' and `tramp-remote-process-environment'.
+
+*** Success of remote copy is checked.
+When the variable `file-precious-flag' is set, the success of a remote
+file copy is checked via the file's checksum.
+
+** comint-mode uses `start-file-process' now (see Lisp Changes).
+If `default-directory' is a remote file name, subprocesses are started
+on the corresponding remote system.
+
+** C-x C-q in dired-mode now runs the command wdired-change-to-wdired-mode.
\f
* Changes in Emacs 23.1 on non-free operating systems
+---
+** IPv6 is supported on MS-Windows.
+Emacs now supports IPv6 on Windows XP and later, and earlier versions
+of Windows with third party IPv6 stacks installed. Previously IPv6 was
+supported on other platforms, but not on Windows due to using the winsock
+1.1 header file, even though Emacs was linking to the winsock 2 library.
+
\f
* Incompatible Lisp Changes in Emacs 23.1
\f
* Lisp Changes in Emacs 23.1
++++
+** In `condition-case', a handler can specify "let the debugger run first".
+
+You do this by writing `debug' in the list of conditions to be handled,
+like this:
+
+ (condition-case nil
+ (foo bar)
+ ((debug error) nil))
+
+** The `require-match' argument to `completing-read' accepts a new value
+`confirm-only'.
+
+++
** The regexp form \(?<num>:<regexp>\) specifies the group number explicitly.
** The new function `image-refresh' refreshes all images associated
with a given image specification.
++++
+** The new function `start-file-process is similar to `start-process',
+but obeys file handlers. The file handler is chosen based on
+`default-directory'. The functions `start-file-process-shell-command'
+and `process-file-shell-command' are also new; they call internally
+`start-file-process and `process-file', respectively.
+
++++
+** `file-remote-p' has new optional parameters IDENTIFICATION and CONNECTED.
+IDENTIFICATION specifies which part of the remote identifier has to be
+returned. With CONNECTED passed non-nil, it is checked whether a
+remote connection has been established already.
+
+** The two new functions `looking-at-p' and `string-match-p' can do
+the same matching as `looking-at' and `string-match' without changing
+the match data.
+
+** The interactive-form of a function can be added post-facto via the
+`interactive-form' symbol property. Mostly useful to add complex interactive
+forms to subroutines.
\f
* New Packages for Lisp Programming in Emacs 23.1