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.

Assistant/WebApp/Configurators/AWS.hs

@@ -207,7 +207,7 @@ makeAWSRemote maker remotetype defaultgroup (AWSCreds ak sk) name config =
 	setupCloudRemote defaultgroup Nothing $
 		maker hostname remotetype (Just creds) config
   where
-  	creds = (T.unpack ak, T.unpack sk)
+	creds = (T.unpack ak, T.unpack sk)
 	{- AWS services use the remote name as the basis for a host
 	 - name, so filter it to contain valid characters. -}
 	hostname = case filter isAlphaNum name of