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.

Command/ConfigList.hs

@@ -29,7 +29,7 @@ start = do
 	showConfig coreGCryptId =<< fromRepo (Git.Config.get coreGCryptId "")
 	stop
   where
-  	showConfig k v = liftIO $ putStrLn $ k ++ "=" ++ v
+	showConfig k v = liftIO $ putStrLn $ k ++ "=" ++ v
 
 {- The repository may not yet have a UUID; automatically initialize it
  - when there's a git-annex branch available. -}