On Tue, Feb 01, 2022 at 02:24:35PM +0000, goncholden via Users list for the GNU Emacs text editor wrote:
> I am looking up documentation for emacs-version. But cannot understand the meaning of
> 
> If optional argument HERE is non-nil, insert string at point.
> 
> --------
> Doc:
> 
> (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.

When in a buffer (whose content is not very important to you) try:

  M-x eval-expression

Then enter

  (emacs-version 'bluntschli)

and see what happens :)

Of course, any value besides 'bluntschli will do, as long as it is not
nil.

Of course, since it doesn't make a difference, you'll use t to not
coufuse your readers.

Cheers
-- 
tomás