Merged from emacs@sv.gnu.org

Patches applied:

 * emacs@sv.gnu.org/emacs--devo--0--patch-371
   Update from CVS

 * emacs@sv.gnu.org/emacs--devo--0--patch-372
   Update from CVS

 * emacs@sv.gnu.org/emacs--devo--0--patch-373
   Update from CVS

 * emacs@sv.gnu.org/emacs--devo--0--patch-374
   Update from CVS

 * emacs@sv.gnu.org/emacs--devo--0--patch-375
   Merge from gnus--rel--5.10

 * emacs@sv.gnu.org/emacs--devo--0--patch-376
   Update from CVS

 * emacs@sv.gnu.org/emacs--devo--0--patch-377
   Update from CVS

 * emacs@sv.gnu.org/emacs--devo--0--patch-378
   Update from CVS

 * emacs@sv.gnu.org/emacs--devo--0--patch-379
   Merge from erc--emacs--21

 * emacs@sv.gnu.org/emacs--devo--0--patch-380
   Update from CVS

 * emacs@sv.gnu.org/emacs--devo--0--patch-381
   Update from CVS

 * emacs@sv.gnu.org/emacs--devo--0--patch-382
   Update from CVS

 * emacs@sv.gnu.org/emacs--devo--0--patch-383
   Update from CVS

 * emacs@sv.gnu.org/emacs--devo--0--patch-384
   Update from CVS

 * emacs@sv.gnu.org/emacs--devo--0--patch-385
   Update from CVS

 * emacs@sv.gnu.org/emacs--devo--0--patch-386
   Update from erc--emacs--22

 * emacs@sv.gnu.org/emacs--devo--0--patch-387
   Fix ERC bug introduced in last patch

 * emacs@sv.gnu.org/emacs--devo--0--patch-388
   Update from erc--emacs--22

 * emacs@sv.gnu.org/emacs--devo--0--patch-389
   Update from CVS

 * emacs@sv.gnu.org/emacs--devo--0--patch-390
   Update from CVS

 * emacs@sv.gnu.org/emacs--devo--0--patch-391
   Update from CVS

 * emacs@sv.gnu.org/emacs--devo--0--patch-392
   Update from CVS

 * emacs@sv.gnu.org/emacs--devo--0--patch-393
   Update from CVS

 * emacs@sv.gnu.org/emacs--devo--0--patch-394
   Update from CVS

 * emacs@sv.gnu.org/emacs--devo--0--patch-395
   Update from CVS

 * emacs@sv.gnu.org/emacs--devo--0--patch-396
   Update from CVS

 * emacs@sv.gnu.org/emacs--devo--0--patch-397
   Update from CVS

 * emacs@sv.gnu.org/emacs--devo--0--patch-398
   Merge from gnus--rel--5.10

 * emacs@sv.gnu.org/emacs--devo--0--patch-399
   Update from CVS

 * emacs@sv.gnu.org/emacs--devo--0--patch-400
   Update from CVS

 * emacs@sv.gnu.org/emacs--devo--0--patch-401
   Update from CVS

 * emacs@sv.gnu.org/emacs--devo--0--patch-402
   Update from CVS

 * emacs@sv.gnu.org/emacs--devo--0--patch-403
   Rcirc update from Ryan Yeske

 * emacs@sv.gnu.org/emacs--devo--0--patch-404
   Update from CVS

 * emacs@sv.gnu.org/emacs--devo--0--patch-405
   Update from CVS

 * emacs@sv.gnu.org/emacs--devo--0--patch-406
   Update from CVS

 * emacs@sv.gnu.org/emacs--devo--0--patch-407
   Update from CVS

 * emacs@sv.gnu.org/emacs--devo--0--patch-408
   Update from CVS

 * emacs@sv.gnu.org/emacs--devo--0--patch-409
   Update from CVS

 * emacs@sv.gnu.org/emacs--devo--0--patch-410
   Merge from gnus--rel--5.10

 * emacs@sv.gnu.org/emacs--devo--0--patch-411
   Miscellaneous tq-related fixes.

 * emacs@sv.gnu.org/emacs--devo--0--patch-412
   Update from CVS

 * emacs@sv.gnu.org/gnus--rel--5.10--patch-121
   Update from CVS

 * emacs@sv.gnu.org/gnus--rel--5.10--patch-122
   Update from CVS

 * emacs@sv.gnu.org/gnus--rel--5.10--patch-123
   Update from CVS

 * emacs@sv.gnu.org/gnus--rel--5.10--patch-124
   Update from CVS

 * emacs@sv.gnu.org/gnus--rel--5.10--patch-125
   Update from CVS

 * emacs@sv.gnu.org/gnus--rel--5.10--patch-126
   Merge from emacs--devo--0

 * emacs@sv.gnu.org/gnus--rel--5.10--patch-127
   Update from CVS


git-archimport-id: lorentey@elte.hu--2004/emacs--multi-tty--0--patch-581

1 files changed, 37 insertions, 23 deletions

diff --git a/lispref/customize.texi b/lispref/customize.texi
index 3aca1a90bcf..9e10e547b56 100644
--- a/lispref/customize.texi
+++ b/lispref/customize.texi
@@ -133,18 +133,21 @@ version.  The value @var{version} must be a string.
 
 @item :package-version '(@var{package} . @var{version})
 This option specifies that the item was first introduced in
-@var{package} version @var{version}, or that its default value was
-changed in that version.  This keyword takes priority over :version.
-The value of @var{package} is a symbol and @var{version} is a string.
-The @var{package} and @var{version} must appear in the alist
-@code{customize-package-emacs-version-alist}.  Since @var{package} must
-be unique and the user might see it in an error message, a good choice
-is the official name of the package, such as MH-E or Gnus.
+@var{package} version @var{version}, or that its meaning or default
+value was changed in that version.  The value of @var{package} is a
+symbol and @var{version} is a string.
 
+This keyword takes priority over @code{:version}.
+
+@var{package} should be the official name of the package, such as MH-E
+or Gnus.  If the package @var{package} is released as part of Emacs,
+@var{package} and @var{version} should appear in the value of
+@code{customize-package-emacs-version-alist}.
 @end table
 
-Packages that use the @code{:package-version} keyword must also update
-the @code{customize-package-emacs-version-alist} variable.
+Packages distributed as part of Emacs that use the
+@code{:package-version} keyword must also update the
+@code{customize-package-emacs-version-alist} variable.
 
 @defvar customize-package-emacs-version-alist
 This alist provides a mapping for the versions of Emacs that are
@@ -248,19 +251,30 @@ turn this feature back on, if someone would like to do the work.
 
   Use @code{defcustom} to declare user-editable variables.
 
-@defmac defcustom option default doc [keyword value]@dots{}
-Declare @var{option} as a customizable user option variable.  Do not
-quote @var{option}.  The argument @var{doc} specifies the documentation
-string for the variable.  There is no need to start it with a @samp{*}
-because @code{defcustom} automatically marks @var{option} as a
-@dfn{user option} (@pxref{Defining Variables}).
-
-If @var{option} is void, @code{defcustom} initializes it to
-@var{default}.  @var{default} should be an expression to compute the
-value; be careful in writing it, because it can be evaluated on more
-than one occasion.  You should normally avoid using backquotes in
-@var{default} because they are not expanded when editing the value,
-causing list values to appear to have the wrong structure.
+@defmac defcustom option standard doc [keyword value]@dots{}
+This construct declares @var{option} as a customizable user option
+variable.  You should not quote @var{option}.  The argument @var{doc}
+specifies the documentation string for the variable.  There is no need
+to start it with a @samp{*}, because @code{defcustom} automatically
+marks @var{option} as a @dfn{user option} (@pxref{Defining
+Variables}).
+
+The argument @var{standard} is an expression that specifies the
+standard value for @var{option}.  Evaluating the @code{defcustom} form
+evaluates @var{standard}, but does not necessarily install the
+standard value.  If @var{option} already has a default value,
+@code{defcustom} does not change it.  If the user has saved a
+customization for @var{option}, @code{defcustom} installs the user's
+customized value as @var{option}'s default value.  If neither of those
+cases applies, @code{defcustom} installs the result of evaluating
+@var{standard} as the default value.
+
+The expression @var{standard} can be evaluated at various other times,
+too---whenever the customization facility needs to know @var{option}'s
+standard value.  So be sure to use an expression which is harmless to
+evaluate at any time.  We recommend avoiding backquotes in
+@var{standard}, because they are not expanded when editing the value,
+so list values will appear to have the wrong structure.
 
 If you specify the @code{:set} option, to make the variable take other
 special actions when set through the customization buffer, the
@@ -403,7 +417,7 @@ type of @var{symbol}.
 @end defun
 
 Internally, @code{defcustom} uses the symbol property
-@code{standard-value} to record the expression for the default value,
+@code{standard-value} to record the expression for the standard value,
 and @code{saved-value} to record the value saved by the user with the
 customization buffer.  Both properties are actually lists whose car is
 an expression which evaluates to the value.