Fix time-stamp-time-zone bugs introduced in July

This fixes a bug introduced when the July changes to
format-time-string installed, as the changes were not
correctly handled in this module (Bug#22302).
Also, document time stamp time zones.
* lisp/time-stamp.el (time-stamp-time-zone): Document values better.
(time-stamp--format): New private function.
(time-stamp-string, time-stamp-string-preprocess)
(time-stamp-do-number): Use it.
* doc/emacs/files.texi (Time Stamps): Mention time zones.
* doc/misc/autotype.texi (Timestamps): Document time-stamp-time-zone.

1 files changed, 5 insertions, 3 deletions

diff --git a/doc/misc/autotype.texi b/doc/misc/autotype.texi
index 839782a3b51..6bdbd344c7a 100644
--- a/doc/misc/autotype.texi
+++ b/doc/misc/autotype.texi
@@ -531,15 +531,17 @@ then @code{time-stamp} is conveniently listed as an option in the
 customization buffer.
 
 @vindex time-stamp-active
+@findex time-stamp-toggle-active
 @vindex time-stamp-format
-@vindex time-stamp-start
+@vindex time-stamp-time-zone
 The time stamp is updated only if the customizable variable
 @code{time-stamp-active} is on, which it is by default; the command
 @code{time-stamp-toggle-active} can be used to toggle it.  The format of
-the time stamp is set by the customizable variable
-@code{time-stamp-format}.
+the time stamp is set by the customizable variables
+@code{time-stamp-format} and @code{time-stamp-time-zone}.
 
 @vindex time-stamp-line-limit
+@vindex time-stamp-start
 @vindex time-stamp-end
 @vindex time-stamp-count
 @vindex time-stamp-inserts-lines