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_codecs.py

@@ -548,7 +548,7 @@ punycode_testcases = [
 
 for i in punycode_testcases:
     if len(i)!=2:
-        print repr(i)
+        print(repr(i))
 
 class PunycodeTest(unittest.TestCase):
     def test_encode(self):