bug#74848: [PATCH] calendar: check for presuppositions in `calendar-date-is-valid-p'

[Eli Zaretskii]

> From: Richard Lawrence <rwl@recursewithless.net>
> Cc: 74848@debbugs.gnu.org
> Date: Sat, 14 Dec 2024 13:19:19 +0100
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > The commit log message should include the file and the function(s)
> > where the changes are done, as well as a short description of the
> > changes.  See CONTRIBUTE for more details, and see "git log" for the
> > examples of how we format commit log messages.  Please don't forget to
> > mention the bug number in the commit log message.
> 
> Woops, sorry, I did look at that file but I guess I missed that. New
> patch attached.
> 
> > P.S. I presume you've run the relevant parts of the test suite and
> > verified that they still succeed.  If not, please do.
> 
> Oddly enough, unless I'm missing something, there don't seem to be any
> tests for calendar.el. There *are* a bunch of test files in
> test/lisp/calendar, but they are all for other files, not for
> calendar.el itself. The attached patch includes a new test file with a
> basic test of the predicate, and make check reveals no relevant
> problems.

Thanks, installed on the master branch, and closing the bug.

I needed to tweak the commit log message somewhat; please see how I
changed it and try to follow these conventions in the future.