Fix haddocks of Data.IntMap.compose

Author: tomsmeding

containers/src/Data/IntMap/Internal.hs

@@ -812,8 +812,8 @@ disjoint t1@(Bin p1 l1 r1) t2@(Bin p2 l2 r2) = case treeTreeBranch p1 p2 of
   Compose
 --------------------------------------------------------------------}
 -- | Relate the keys of one map to the values of
--- the other, by using the values of the former as keys for lookups
--- in the latter.
+-- the other, by using the values of the latter as keys for lookups
+-- in the former.
 --
 -- Complexity: \( O(n * \min(m,W)) \), where \(m\) is the size of the first argument
 --