bug#30937: In `comment-region', C-g doesn't work.

[Eli Zaretskii]

> Date: Sun, 25 Mar 2018 15:39:59 +0000
> Cc: 30937@debbugs.gnu.org
> From: Alan Mackenzie <acm@muc.de>
> 
> Yes, I've just tried it on X.  It works there (except it leaves point in
> a suboptimal position: the starting point.  It should really leave point
> after the last newly commented line when the quit happened).  It works
> on emacs -nw, with the same proviso.
> 
> It doesn't work at all on a Linux tty.

??? How come it works in "emacs -nw" but not on a "Linux tty" (which
is what, btw? the raw Linux console?).  In both cases, C-g should
trigger a SIGINT, so Emacs should be even more responsive to C-g than
on X.  What am I missing?