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.

Logs/Web.hs

@@ -76,7 +76,7 @@ knownUrls = do
 		return $ concat r
   where
 	geturls Nothing = return []
-  	geturls (Just logsha) = getLog . L.unpack <$> catObject logsha
+	geturls (Just logsha) = getLog . L.unpack <$> catObject logsha
 
 data Downloader = DefaultDownloader | QuviDownloader