bug#46621: Copy line

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Cc: Daniel Martín <mardani29@yahoo.es>,
>   46621@debbugs.gnu.org,
>   juri@linkov.net
> Date: Sat, 20 Feb 2021 14:05:44 +0100
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > I usually use M-/ for that.  It makes typing something that you just
> > typed very easy: just a single character followed by M-/ usually does
> > the job.  This allows me to type just what is needed, without
> > redundant "renaming".
> 
> `dabbrev-expand'?  I just tried "emacs -Q" and then `M-/' and Emacs just
> beeped at me:

You need to type the beginning of what you want it to complete before
M-/.  Try

  b M-/
  f M-/
  f M-/ M-/ M-/

etc.