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.)
diff --git a/Lib/test/test_dbm.py b/Lib/test/test_dbm.py
index 0a9db4e..a3b7716 100755
--- a/Lib/test/test_dbm.py
+++ b/Lib/test/test_dbm.py
@@ -31,7 +31,7 @@
     d.keys()
     if 'a' in d:
         if verbose:
-            print 'Test dbm keys: ', d.keys()
+            print('Test dbm keys: ', d.keys())
 
     d.close()