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_pty.py

@@ -6,7 +6,7 @@ TEST_STRING_2 = "For my pet fish, Eric.\n"
 
 if verbose:
     def debug(msg):
-        print msg
+        print(msg)
 else:
     def debug(msg):
         pass