bug#65288: 30.0.50; Make Type: annotation optional in *Help* buffers

[Gregory Heytings]

> Andrea, would it make sense to introduce an option which could disable 
> showing this information in *Help*?

FWIW, it's already possible to do that with:

(defun comp-function-type-spec (&rest args))

(which disables showing that information in all cases) or

(define-advice comp-function-type-spec (:around (cfts function))
  (unless (member function '(char-after char-before))
    (funcall cfts function)))

(which disables showing that information for specific cases).  A user 
option would perhaps make sense, though.