FingerHoles: use .saved_context()

boxes/edges.py

@@ -674,7 +674,7 @@ class FingerHoles(FingerJointBase):
         :param bedBoltSettings:  (Default value = None)
 
         """
-        self.boxes.ctx.save()
+        with self.boxes.saved_context():
             self.boxes.moveTo(x, y, angle)
             s, f = self.settings.space, self.settings.finger
             p = self.settings.play
@@ -694,10 +694,6 @@ class FingerHoles(FingerJointBase):
                 self.boxes.rectangularHole(pos + 0.5 * f, 0,
                                            f+p, self.settings.width+p)
 
-        self.ctx.restore()
-        self.ctx.move_to(0, 0)
-
-
 class FingerHoleEdge(BaseEdge):
     """Edge with holes for a parallel finger joint"""
     char = 'h'