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/crashers/borrowed_ref_1.py

@@ -8,7 +8,7 @@ class A(object):
 
 class B(object):
     def __del__(self):
-        print 'hi'
+        print('hi')
         del D.__missing__
 
 class D(dict):