bug#36516: Wrong dynamic abbrev expansion after space

[Eli Zaretskii]

> From: Juri Linkov <juri@linkov.net>
> Cc: 36516@debbugs.gnu.org
> Date: Mon, 08 Jul 2019 01:13:13 +0300
> 
> >> 0. emacs -Q
> >> 1. Type these two lines:
> >> str 1
> >> str 2
> >> 2. On the third line type:
> >>  s                      ;; self-insert-command
> >>  M-/                    ;; dabbrev-expand
> >>  SPC                    ;; self-insert-command
> >>  M-/                    ;; dabbrev-expand
> >>  M-/                    ;; dabbrev-expand
> >> 3. The word after "str " is expanded to some random word.
> >
> > Why did you expect something different?  The first M-/ copies "2", but
> > the next one after that replaces "2" with some alternative, which
> > exactly depends on what other buffers you have.  I see no bug here,
> > you are just expecting from M-/ something it cannot give you.  The
> > "SPC M-/" trick is already reaching too far out, IMO.
> 
> The example in the first part of my bug report demonstrates that
> this useful feature works as documented in the manual.

It does?  Please explain how it does, because I don't see it.