Whitespace normalization.
diff --git a/Lib/test/test_bufio.py b/Lib/test/test_bufio.py
index a3196ca..14a926a 100644
--- a/Lib/test/test_bufio.py
+++ b/Lib/test/test_bufio.py
@@ -36,7 +36,7 @@
                 os.unlink(test_support.TESTFN)
             except:
                 pass
-    
+
     def drive_one(self, pattern):
         for length in lengths:
             # Repeat string 'pattern' as often as needed to reach total length