Fix excessive-free-point-style lint errors on Rank.hs

Summary: Just replace `.` with `$`, also tweaked the spacing a bit for skimmability

Reviewed By: chessai

Differential Revision: D28411898

fbshipit-source-id: d18b9ef5db99b82d150231080c89f812f709f409

Duckling/Ranking/Rank.hs

@@ -57,9 +57,10 @@ rank
   -> [ResolvedToken]
   -> [ResolvedToken]
 rank classifiers targets tokens =
-  Set.toList . Set.fromList
-  . map (\(Candidate token _ _) -> token)
-  . winners
+  Set.toList
+  $ Set.fromList
+  $ map (\(Candidate token _ _) -> token)
+  $ winners
   $ map makeCandidate tokens
   where
     makeCandidate :: ResolvedToken -> Candidate