refine

Author: willmcgugan

src/textual/renderables/_blend_colors.py

@@ -15,8 +15,6 @@ def blend_colors(color1: Color, color2: Color, ratio: float) -> Color:
     Returns:
         A Color representing the blending of the two supplied colors.
     """
-    # assert color1.triplet is not None
-    # assert color2.triplet is not None
     if color1.triplet is None or color2.triplet is None:
         return color2
     r1, g1, b1 = color1.triplet

src/textual/widget.py

@@ -2374,7 +2374,8 @@ def _scroll_to(
         animator.force_stop_animation(self, "scroll_x")
         animator.force_stop_animation(self, "scroll_y")
 
-        def _animate_on_complete():
+        def _animate_on_complete() -> None:
+            """set last scroll time, and invoke callback."""
             self._last_scroll_time = monotonic()
             if on_complete is not None:
                 self.call_next(on_complete)