Whitespace normalization.
diff --git a/Lib/test/test_mailbox.py b/Lib/test/test_mailbox.py
index 40cf192..ab164d0 100644
--- a/Lib/test/test_mailbox.py
+++ b/Lib/test/test_mailbox.py
@@ -754,15 +754,15 @@
         key1 = self._box.add(msg)
         self._box.flush()
         self._box.close()
-        
+
         self._box = self._factory(self._path)
         self._box.lock()
         key2 = self._box.add(msg)
         self._box.flush()
         self.assert_(self._box._locked)
         self._box.close()
-        
-        
+
+
 
 class TestMbox(_TestMboxMMDF):