[add forMn_ and forMn for iterating over a list with a counter
John Meacham <john@repetae.net>**20070516035641] hunk ./Util/Gen.hs 8
-import List
+import Data.List
hunk ./Util/Gen.hs 26
+forMn_ xs = forM_ (zip xs [0 :: Int .. ])
+forMn xs = forM (zip xs [0 :: Int .. ])