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/Schedule.hs

@@ -27,7 +27,7 @@ seek = withWords start
 start :: [String] -> CommandStart
 start = parse
   where
-  	parse (name:[]) = go name performGet
+	parse (name:[]) = go name performGet
 	parse (name:expr:[]) = go name $ \uuid -> do
 		showStart "schedile" name
 		performSet expr uuid