[deduplicate insertAt
Helmut Grohne <grohne@cs.uni-bonn.de>**20140211122006
 Ignore-this: 685bd6abdd8dc1a45a1a71f3720901e3
] hunk ./src/Igor2/RuleDevelopment/Cata.hs 18
+import Data.Util (insertAt)
hunk ./src/Igor2/RuleDevelopment/Cata.hs 208
-insertAt :: Int -> a -> [a] -> [a]
-insertAt 0 a xs     = a:xs
-insertAt _ a []     = [a]
-insertAt i a (x:xs) = x:(insertAt (i-1) a xs)
-   