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bug#36516: Wrong dynamic abbrev expansion after space

From: Alan Third
Subject: bug#36516: Wrong dynamic abbrev expansion after space
Date: Sat, 27 Jul 2019 18:18:31 +0100
User-agent: Mutt/1.12.0 (2019-05-25)

On Tue, Jul 09, 2019 at 12:35:44AM +0300, Juri Linkov wrote:
> >> 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.

’s M-/ SPC M-/’ doesn’t do a normal completion, it does this (from 
the manual):

    After you have expanded a dynamic abbrev, you can copy additional
    words that follow the expansion in its original context. Simply type
    <SPC> M-/ for each additional word you want to copy. The spacing and
    punctuation between words is copied along with the words.

I suppose that subsequent M-/’s are undocumented, but the current
behaviour is, IMO, definitely confusing as it seems to search other
buffers for completions even though there are valid completions in the
current buffer.

Alan Third

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