bug#53720: Documentation for emacs-version

[Eli Zaretskii]

> Date: Wed, 02 Feb 2022 10:03:29 +0000
> From:  goncholden via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
> 
> > (emacs-version &optional HERE)
> > Probably introduced at or before Emacs version 19.20.
> > Return string describing the version of Emacs that is running.
> > If optional argument HERE is non-nil, insert string at point.
> 
> This is the doc string for Emacs 27.2 (the latest release):
> 
> Return string describing the version of Emacs that is running.
> If optional argument HERE is non-nil, insert string at point.
> Don’t use this function in programs to choose actions according
> to the system configuration; look at ‘system-configuration’ instead.
> But it's still a poor doc string. It should, first
> of all, describe the interactive use. It should say:
> With a prefix argument, insert string at point.
> ^^^^^^^^^^^^^^^^^^^^^^
> Only after that interactive description should it
> give the Emacs-Lisp description of argument HERE:
> When called from Lisp, optional argument HERE
> corresponds to the prefix argument.
> Consider filing a (doc) bug report for this:
> `M-x report-emacs-bug'.

Thanks, I fixed the wording of the doc string.