PEP 572: Fix example to more accurately reflect reality

pep-0572.rst

@@ -136,13 +136,14 @@ scope, which will succeed; but it will evaluate everything else in a function::
         prefixed_names = <listcomp>(iter(names))
 
 The name ``prefix`` is thus searched for at global scope, ignoring the class
-name. Under the proposed semantics, this name will be eagerly bound, being
-approximately equivalent to::
+name. Under the proposed semantics, this name will be eagerly bound; and the
+same early binding then handles the outermost iterable as well. The list
+comprehension is thus approximately equivalent to::
 
     class X:
         names = ["Fred", "Barney", "Joe"]
         prefix = "> "
-        def <listcomp>(prefix=prefix):
+        def <listcomp>(names=names, prefix=prefix):
             result = []
             for name in names:
                 result.append(prefix + name)
@@ -159,8 +160,7 @@ be late-bound as usual.
 
 One consequence of this change is that certain bugs in genexps will not
 be detected until the first call to ``next()``, where today they would be
-caught upon creation of the generator. TODO: Discuss the merits and costs
-of amelioration proposals.
+caught upon creation of the generator. See 'open questions' below.
 
 
 Recommended use-cases