GitLab

(ps-run-mode-map): Adapt for comint-mode; omit "\r", [return]..
(ps-mode-other-newline): Simplify.
(ps-run-mode): Derive from comint-mode instead of
fundamental-mode, yielding input history etc.
(ps-run-start, ps-run-quit, ps-run-clear, ps-run-region)
(ps-run-send-string): Adapt for comint-mode.
(ps-run-newline): Remove now unneeded function.

Fixes: debbugs:5954