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.

Utility/WebApp.hs

@@ -117,7 +117,7 @@ getSocket h = do
 	when (isJust h) $
 		error "getSocket with HostName not supported on this OS"
 	addr <- inet_addr "127.0.0.1"
- 	sock <- socket AF_INET Stream defaultProtocol
+	sock <- socket AF_INET Stream defaultProtocol
 	preparesocket sock
 	bindSocket sock (SockAddrInet aNY_PORT addr)
 	use sock