Re: did the abbrev mechanism ever expand «two words» to «two different words».

[Eli Zaretskii]

> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Cc: Uwe Brauer <oub@mat.ucm.es>,  emacs-devel@gnu.org
> Date: Thu, 07 Jan 2021 15:36:52 -0500
> 
> >   An “abbrev” is a word that has been defined to “expand” into a specified
> >   “expansion”.  When you insert a word-separator character following the
> >   abbrev, that expands the abbrev—replacing the abbrev with its expansion.
> >   For example, if ‘foo’ is defined as an abbrev expanding to ‘find outer
> >   otter’, then typing ‘f o o .’ will insert ‘find outer otter.’.
> >
> > This mean a word-separator character cannot be part of an abbrev.
> 
> That's true for the default behavior.
> Since Emacs-24, abbrev tables do support abbrevs whose name includes
> non-word characters, but it requires extra work on the part of the user
> in order to characterize the possible names via the `:regexp` property
> (see `C-h o define-abbrev-table`).

Then I guess we did a poor job of documenting that extension.