bug#46621: Copy line

[Mattias Engdegård]

19 juni 2022 kl. 13.43 skrev Lars Ingebrigtsen <larsi@gnus.org>:

> Simen proposed something quite similar (added to the CCs), and my only
> objection was that the semantics of the simpler command is quite
> clear -- it always creates a new line, even if we're at a final line in
> a buffer without a newline.

Actually shouldn't duplicating such a line add a newline + a copy of the 
current line with no terminal newline? Right now the copy is always 
newline-terminated even if the original wasn't, which seems a bit inconsistent. 
What do you think?

> When dealing with regions, it's not quite
> clear what the semantics should be in those corner cases (i.e., regions
> that doesn't end with a newline)...

Not much of a edge case, is it? If you select "bon" and duplicate you end up 
with "bonbon", as promised.

Region-sensitive commands are useful since they multiplex functionality on the 
same keys without added cognitive load. (It's high time we rebound M-u to 
upcase-dwim etc.)