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For older news, see the file ONEWS
+\f
+* Changes in Emacs 21.2
+
+** When pure storage overflows while dumping, Emacs now prints how
+much pure storage it will approximately need.
+
+** M-x setenv now expands environment variables of the form `$foo' and
+`${foo}' in the specified new value of the environment variable. To
+include a `$' in the value, use `$$'.
+
+** New user option `inhibit-startup-buffer-menu'.
+When loading many files, for instance with `emacs *', Emacs normally
+displays a buffer menu. This option turns the buffer menu off.
+
+** Rmail now displays 5-digit message ids in its summary buffer.
+
+\f
+* Lisp Changes in Emacs 21.2
+
+** Variable aliases have been implemented
+
+- Macro: defvaralias ALIAS-VAR BASE-VAR
+
+This defines the symbol ALIAS-VAR as a variable alias for symbol
+BASE-VAR. This means that retrieving the value of ALIAS-VAR returns
+the value of BASE-VAR, and changing the value of ALIAS-VAR changes the
+value of BASE-VAR.
+
+- Function: indirect-variable VARIABLE
+
+This function returns the variable at the end of the chain of aliases
+of VARIABLE. If VARIABLE is not a symbol, or if VARIABLE is not
+defined as an alias, the function returns VARIABLE.
+
+It might be noteworthy that variables aliases work for all kinds of
+variables, including buffer-local and frame-local variables.
+
+** Functions from `post-gc-hook' are run at the end of garbage
+collection. The hook is run with GC inhibited, so use it with care.
+
\f
* Installation Changes in Emacs 21.1
* faces.el (face-font-registry-alternatives) [windows-nt]: Make
gb2312 an alias for gb2312.1980.
+2001-10-04 Stefan Monnier <monnier@cs.yale.edu>
+
+ * uniquify.el (uniquify-get-proposed-name): Don't assume dirsep is /.
+ (uniquify-reverse-components): Remove.
+
+ * emacs-lisp/bytecomp.el (byte-recompile-directory):
+ Make sure the file is readable.
+ (byte-compile-file): Don't compile if `no-byte-compile' is set.
+ (byte-compile-defvar): Update to reflect the change in Fdefvar.
+ (batch-byte-recompile-directory): Pass arg=0.
+
+ * progmodes/perl-mode.el (perl-indent-continued-arguments): New var.
+ (perl-calculate-indent): Use it.
+ (perl-backward-to-noncomment): Use forward-comment.
+
+ * derived.el (define-derived-mode, derived-mode-make-docstring):
+ Allow `parent' to be nil.
+
+ * textmodes/nroff-mode.el (nroff-mode-abbrev-table, nroff-mode):
+ Use define-derived-mode.
+ (nroff-mode-map, nroff-mode-syntax-table): Massage.
+
+ * mail/mailabbrev.el (mail-abbrev-in-expansion-header-p): Simplify.
+
+ * emacs-lisp/lselect.el: Use facep iso find-face.
+
+ * emacs-lisp/lisp-mode.el (lisp-imenu-generic-expression):
+ Use regexp-opt.
+ (doc-string-elt): Set symbols' prop. Copied from autoload.el.
+ (lisp-font-lock-syntactic-face-function): New function.
+ (lisp-mode-variables): Use it. Make arg optional.
+ (emacs-lisp-mode): Don't pass an arg to lisp-mode-variables.
+ (lisp-mode): Don't pass an arg to lisp-mode-variables.
+ Set comment-start-skip.
+
+ * emacs-lisp/lisp-mnt.el (lm-history-header): Accept `ChangeLog'.
+
+ * emacs-lisp/cl-macs.el (frame-parameter): Add a setf method.
+ (ignore-errors): Don't bother using a `err' symbol.
+
+ * emacs-lisp/autoload.el (autoload-ensure-default-file)
+ (autoload-insert-section-header, autoload-before-p)
+ (autoload-remove-section): New functions.
+ (generate-file-autoloads): Use them.
+ (update-file-autoloads): Use them. Return FILE if there's no cookie.
+ Make sure the autoload file is properly formatted when creating it.
+ (update-autoloads-from-directories): Use them as well.
+ Only update autoloads for files whose timestamp has changed.
+ Add a dummy entry to remember the files which had no autoload cookies.
+
+ * timer.el (timer-relative-time): Fix computation for negative `micro'.
+
+ * subr.el (define-key-after): Allow `key' to be longer than 1.
+ (make-local-hook): Make obsolete.
+ (add-hook, remove-hook): Don't use make-local-hook any more.
+ (make-syntax-table): Inherit all chars from s-s-t.
+
+2001-10-04 Gerd Moellmann <gerd@gnu.org>
+
+ This is a fix for a report saying that resuming a search with C-s
+ C-s doesn't use the case-fold-search setting of the previous
+ search (C-s ... M-c ... then C-s C-s).
+
+ * isearch.el (isearch-last-case-fold-search): New variable.
+ (isearch-mode): Remember value of isearch-case-fold-search
+ in isearch-last-case-fold-search.
+ (isearch-done): Quote value of isearch-case-fold-search.
+ (isearch-repeat): When resuming a search, restore
+ isearch-case-fold-search from isearch-last-case-fold-search.
+
+ Added to NEWS.
+
+ * startup.el (inhibit-startup-buffer-menu): New user-option.
+ (command-line-1): If inhibit-startup-buffer-menu is set, don't
+ display the buffer menu. From Simon Josefsson <jas@extundo.com>.
+
+ This allows upto 99999 messages in the summary without screwing up
+ the summary sorting. Previously 9999 was the maximum. Added to NEWS.
+
+ * mail/rmailsum.el (rmail-make-summary-line)
+ (rmail-make-summary-line-1, rmail-summary-next-same-subject)
+ (rmail-summary-goto-msg, rmail-summary-goto-msg):
+ Allow 5-digit message ids instead of 4.
+
+ This adds expansion of environment variables in the value
+ specified with M-x setenv. Added to NEWS.
+
+ * env.el (substitute-env-vars): New function.
+ (setenv): Add parameter SUBSTITUTE-ENV-VARS. If set, substitute
+ environment variables in VALUE. Return VALUE.
+
2001-10-03 Stefan Monnier <monnier@cs.yale.edu>
* pcvs-util.el (cvs-prefix-define): Typo cons->concat.
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