Change name of function for 'inspect' module to have to return Signature

objects.

pep-0362.txt

@@ -130,7 +130,7 @@ When to construct the Parameter object?
 The Parameter object can either be created in an eager or lazy
 fashion.  In the eager situation, the object can be created during
 creation of the function object.  In the lazy situation, one would
-pass a function object to ``inspect.signature()`` and that would
+pass a function object to ``inspect.getsignature()`` and that would
 generate the Signature object and store it to ``__signature__`` if
 needed, and then return the value of ``__signature__``.