(make-local-variable 'comint-prompt-regexp)
;; Don't put repeated commands in command history many times.
(set (make-local-variable 'comint-input-ignoredups) t)
(make-local-variable 'comint-prompt-regexp)
;; Don't put repeated commands in command history many times.
(set (make-local-variable 'comint-input-ignoredups) t)