Merge pull request #105 from rimmington/safe-hashset

Mark Data.HashSet as Trustworthy

Author: tibbe

Data/HashSet.hs

@@ -2,6 +2,9 @@
 #if __GLASGOW_HASKELL__ >= 708
 {-# LANGUAGE TypeFamilies #-}
 #endif
+#if __GLASGOW_HASKELL__ >= 702
+{-# LANGUAGE Trustworthy #-}
+#endif
 
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