Fix most trivially-findable print statements.

There's one major and one minor category still unfixed:
doctests are the major category (and I hope to be able to augment the
refactoring tool to refactor bona fide doctests soon);
other code generating print statements in strings is the minor category.

(Oh, and I don't know if the compiler package works.)

Lib/test/test_xml_etree_c.py

@@ -35,7 +35,7 @@ def sanity():
 
 def check_method(method):
     if not callable(method):
-        print method, "not callable"
+        print(method, "not callable")
 
 def serialize(ET, elem, encoding=None):
     import StringIO