Untabify to pass the -tt test.
diff --git a/Lib/whichdb.py b/Lib/whichdb.py
index aa1761c..4dd4e3a 100644
--- a/Lib/whichdb.py
+++ b/Lib/whichdb.py
@@ -56,7 +56,7 @@
 
     # BSD hash v2 has a 12-byte NULL pad in front of the file type
     try:
-	(magic,) = struct.unpack("=l", s16[-4:])
+        (magic,) = struct.unpack("=l", s16[-4:])
     except struct.error:
         return ""