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/Remote.hs

@@ -70,7 +70,7 @@ remoteLocationIsSshUrl _ = False
 parseRemoteLocation :: String -> Repo -> RemoteLocation
 parseRemoteLocation s repo = ret $ calcloc s
   where
-  	ret v
+	ret v
 #ifdef mingw32_HOST_OS
 		| dosstyle v = RemotePath (dospath v)
 #endif