Remove unused imports and fix line lengths

b_asic/GUI/arrow.py

@@ -78,7 +78,8 @@ class Arrow(QGraphicsPathItem):
 
     def moveLine(self):
         """
-        Draw a line connecting ``self.source`` with ``self.destination``. Used as callback when moving operations.
+        Draw a line connecting ``self.source`` with ``self.destination``.
+        Used as callback when moving operations.
         """
         ORTHOGONAL = True
         OFFSET = 2 * PORTWIDTH