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_datetime.py b/Lib/test/test_datetime.py
index b32017e..70b00a4 100644
--- a/Lib/test/test_datetime.py
+++ b/Lib/test/test_datetime.py
@@ -3287,11 +3287,11 @@
                               gc.garbage)
         if hasattr(sys, 'gettotalrefcount'):
             thisrc = sys.gettotalrefcount()
-            print >> sys.stderr, '*' * 10, 'total refs:', thisrc,
+            print('*' * 10, 'total refs:', thisrc, end=' ', file=sys.stderr)
             if lastrc:
-                print >> sys.stderr, 'delta:', thisrc - lastrc
+                print('delta:', thisrc - lastrc, file=sys.stderr)
             else:
-                print >> sys.stderr
+                print(file=sys.stderr)
             lastrc = thisrc
 
 if __name__ == "__main__":