#3968: fix missing update() call in end_fill().

Lib/lib-tk/turtle.py

@@ -306,6 +306,7 @@ class RawPen:
                                             {'fill': self._color,
                                              'smooth': smooth})
                 self._items.append(item)
+                self._canvas.update()
         self._path = []
         self._filling = flag
         if flag:

Misc/NEWS

@@ -89,6 +89,8 @@ Core and builtins
 Library
 -------
 
+- Issues #3968 and #3969: two minor turtle problems.
+
 - Issue #3547: Fixed ctypes structures bitfields of varying integer
   sizes.