The patch looks good to me (aside from extra whitespace on the blank lines in methodobject.c, and I agree with Serhiy about s/brackets/parens/).  Also, I like the suggestion of using __text_signature__ instead of '(...)'.  However, just to avoid any possible issues with __text_signature__ being blank or missing, I would go with `argspec = getattr(object, '__text_signature__', '') or '(...)'` instead of straight `object.__text_signature__` (and note that there are two places to change in pydoc).