bug#9961: Subject: 24.0.91; shell prompt doubled

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Date: Tue, 25 Aug 2020 15:13:37 +0200
> Cc: 9961@debbugs.gnu.org
> 
> I poked around to see whether there's any easy way to fix this: Like a
> way to say to comint "send this to the process, but discard the output",
> but there doesn't seem to be?

Would it work to arrange for a temporary filter function, which would
discard the shell's output while .emacs_bash is being processed?