Add haddock to ioctxBatchSizeLimit'

src/System/IO/BlockIO.hs

@@ -52,6 +52,7 @@ import           System.IO.BlockIO.URing (IOResult(..))
 -- | IO context: a handle used by threads submitting IO batches.
 --
 data IOCtx = IOCtx {
+               -- | This is initialised from the 'ioctxBatchSizeLimit' from the 'IOCtxParams'.
                ioctxBatchSizeLimit' :: !Int,
 
                -- | IO concurrency control: used by writers to reserve the