bug#46621: Copy line

[Eli Zaretskii]

> Cc: 46621@debbugs.gnu.org, Juri Linkov <juri@linkov.net>
> Date: Fri, 19 Feb 2021 21:27:09 +0100
> From:  Daniel Martín via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
> 
> > Well, I don't object to adding it, but I'm not sure what the use case is
> > here?  The only time I can remember wanting something like that is when
> > I'm filling a buffer with text for test purposes, which is perhaps not a
> > compelling use case.
> 
> In programming modes, if you need to declare a bunch of variables, you
> may duplicate the current line several times and then proceed to rename
> them.

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".