Fix a bunch of doctests with the -d option of refactor.py.
We still have 27 failing tests (down from 39).
diff --git a/Lib/test/sample_doctest.py b/Lib/test/sample_doctest.py
index e5adee0..89eb5cb 100644
--- a/Lib/test/sample_doctest.py
+++ b/Lib/test/sample_doctest.py
@@ -40,9 +40,9 @@
 def w_blank():
     """
     >>> if 1:
-    ...    print 'a'
-    ...    print
-    ...    print 'b'
+    ...    print('a')
+    ...    print()
+    ...    print('b')
     a
     <BLANKLINE>
     b