fix some mixed space+tab indentation

This fixes all instances of " \t" in the code base. Most common case
seems to be after a "where" line; probably vim copied the two space layout
of that line.

Done as a background task while listening to episode 2 of the Type Theory
podcast.

Logs/MetaData.hs

@@ -67,7 +67,7 @@ getCurrentMetaData k = do
 	return $ currentMetaData $ unionMetaData loggedmeta
 		(lastchanged ls loggedmeta)
   where
-  	lastchanged [] _ = emptyMetaData
+	lastchanged [] _ = emptyMetaData
 	lastchanged ls (MetaData currentlyset) =
 		let m = foldl' (flip M.union) M.empty (map genlastchanged ls)
 		in MetaData $