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_gdbm.py

@@ -15,7 +15,7 @@ g['a'] = 'b'
 g['12345678910'] = '019237410982340912840198242'
 a = g.keys()
 if verbose:
-    print 'Test gdbm file keys: ', a
+    print('Test gdbm file keys: ', a)
 
 'a' in g
 g.close()