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.

Git/Config.hs

@@ -167,7 +167,7 @@ coreBare = "core.bare"
 fromPipe :: Repo -> String -> [CommandParam] -> IO (Either SomeException (Repo, String))
 fromPipe r cmd params = try $
 	withHandle StdoutHandle createProcessSuccess p $ \h -> do
- 		fileEncoding h
+		fileEncoding h
 		val <- hGetContentsStrict h
 		r' <- store val r
 		return (r', val)