Whitespace normalization.  Ugh, we really need to do this more often.
You might want to review this change as it's my first time.  Be gentle. :-)
diff --git a/Lib/test/test_stringprep.py b/Lib/test/test_stringprep.py
index 1f5627a..60425dd 100644
--- a/Lib/test/test_stringprep.py
+++ b/Lib/test/test_stringprep.py
@@ -91,6 +91,6 @@
 
 def test_main():
     test_support.run_unittest(StringprepTests)
-    
+
 if __name__ == '__main__':
     test_main()