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/EnableRemote.hs

@@ -29,7 +29,7 @@ start (name:ws) = go =<< InitRemote.findExisting name
   where
 	config = Logs.Remote.keyValToConfig ws
 	
-  	go Nothing = unknownNameError "Unknown special remote name."
+	go Nothing = unknownNameError "Unknown special remote name."
 	go (Just (u, c)) = do
 		let fullconfig = config `M.union` c	
 		t <- InitRemote.findType fullconfig