clarify CALL_FUNCTION #4141

Doc/ACKS.txt

@@ -189,6 +189,7 @@ docs@python.org), and we'll be glad to correct the problem.
    * Reuben Sumner
    * Kalle Svensson
    * Jim Tittsler
+   * David Turner
    * Ville Vainio
    * Martijn Vries
    * Charles G. Waldman

Doc/library/dis.rst

@@ -755,7 +755,8 @@ the more significant byte last.
    opcode finds the keyword parameters first.  For each keyword argument, the value
    is on top of the key.  Below the keyword parameters, the positional parameters
    are on the stack, with the right-most parameter on top.  Below the parameters,
-   the function object to call is on the stack.
+   the function object to call is on the stack.  Pops all function arguments, and 
+   the function itself off the stack, and pushes the return value.
 
 
 .. opcode:: MAKE_FUNCTION (argc)