bug#36516: Wrong dynamic abbrev expansion after space

[Juri Linkov]

>> 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.

For example:

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
 C-M-/                  ;; dabbrev-completion

This correctly displays all available completions
“str 1” and “str 2”.  But ‘s M-/ SPC M-/ M-/’ doesn't get
the second completion.