(comint-use-prompt-regexp, comint-send-input, comint-source-default,

(comint-use-prompt-regexp, comint-send-input, comint-source-default,
comint-extract-string, comint-get-source, comint-word, comint-completion,
comint-source, comint-prompt-read-only, comint-update-fence):
Fix typos in docstrings.
(comint-use-prompt-regexp-instead-of-fields, comint-kill-output):
Declare with define-obsolete-*-alias macros.
(comint-previous-matching-input-from-input,
comint-next-matching-input-from-input, comint-previous-matching-input,
comint-next-matching-input, comint-forward-matching-input):
Improve argument/docstring consistency.