User-defined methods *can* contain things other than user-defined functions

as the callable, so use more flexible language.

Doc/ref/ref3.tex

@@ -446,7 +446,8 @@ unless nested scopes are enabled.  (See the appendix.)
 
 \item[User-defined methods]
 A user-defined method object combines a class, a class instance (or
-\code{None}) and a user-defined function.
+\code{None}) and any callable object (normally a user-defined
+function).
 \obindex{method}
 \obindex{user-defined method}
 \indexii{user-defined}{method}