* lisp/subr.el (interactive-p): Mention commandp, as this is often
what users are actually looking for.
To test whether your function was called with `call-interactively',
either (i) add an extra optional argument and give it an `interactive'
spec that specifies non-nil unconditionally (such as \"p\"); or (ii)
-use `called-interactively-p'."
+use `called-interactively-p'.
+
+To test whether a function can be called interactively, use
+`commandp'."
(declare (obsolete called-interactively-p "23.2"))
(called-interactively-p 'interactive))