@@ -164,8 +164,8 @@ outputPicture dc pic = liftIO $ do
164164 -- Diff the previous output against the requested output.
165165 -- Differences are currently on a per-row basis.
166166 diffs :: [Bool] = case prevOutputOps as of
167− Nothing -> replicate (fromEnum $ regionHeight $ effectedRegion ops) True
168− Just previousOps -> if effectedRegion previousOps /= effectedRegion ops
167+ Nothing -> replicate (fromEnum $ regionHeight $ affectedRegion ops) True
168+ Just previousOps -> if affectedRegion previousOps /= affectedRegion ops
169169 then replicate (displayOpsRows ops) True
170170 else zipWith (/=) (Vector.toList previousOps)
171171 (Vector.toList ops)