bug#72426: 29.2.50; comint-pager doesn't affect async-shell-command

[Dmitry Gutov <dmitry@gutov.dev>]

On 13/09/2024 09:08, Eli Zaretskii wrote:
>> FWIW async-shell-command's behavior is affected by a bunch of other
>> comint-* variables as well because it uses a major mode which inherits
>> from comint-mode (previously it was shell-mode, now shell-command-mode,
>> but that aspect didn't change).
> Yes, and that is baaad!

It might be non-obvious, but I don't see how else it would work: comint 
is the only built-in subsystem we have that implement a general 
read-evel-print-loop. So we have 'M-x shell' and 'M-x ielm', for 
example, both using it as well (not to mention inf-python, inf-ruby, etc).

And since we wanted, apparently, to have async-shell-command support 
user input (the command can be 'sh', for example), it uses parts of 
comint for its work too (comint-output-filter and the major mode with 
all its local bindings -- not sure if something else too, but this is 
already a lot).

An alternative would be to have separate user options for each of the 
above features which would bind comint's options under the cover. But 
that's not very economical.