>>> If you add "COLUMNS=1024" to tramp-remote-process-environment, you would
>>> get this effect already w/o any change in Tramp. Maybe I shall document
>>> it somewhere in the Tramp manual.
>>
>> It seems it's impossible to set COLUMNS to the width of the output window
>> neither in Tramp nor in async-shell-command.  shell-mode can do this
>> using set-process-window-size.  But Tramp can't do the same for the
>> remote process, and for async-shell-command it's too late to do this
>> because when it displays a window with the output buffer,
>> the command is already finished.
>
> Again, using tramp-remote-process-environment seems to be the
> appropriate place.

Thanks for the suggestion, I customized it to '("COLUMNS=222")
that is approximately equal to my frame's width, thus `ps`
shows enough output, and `dpkg -l '*emacs*'` is not too wide
('dpkg' tries to fill all available columns).

Should a similar option be added for async-shell-command as well?