Only setup canvas when it is first created.

Fixes #1514703

Lib/lib-tk/turtle.py

@@ -679,7 +679,7 @@ class Pen(RawPen):
             _canvas = Tkinter.Canvas(_root, background="white")
             _canvas.pack(expand=1, fill="both")
 
-        setup(width=_width, height= _height, startx=_startx, starty=_starty)
+            setup(width=_width, height= _height, startx=_startx, starty=_starty)
 
         RawPen.__init__(self, _canvas)
 

Misc/NEWS

@@ -19,6 +19,9 @@ Core and builtins
 Library
 -------
 
+- Bug #1514703: Only setup canvas window in turtle when the canvas
+  is created.
+
 - Bug #1513223: .close() of a _socketobj now releases the underlying
   socket again, which then gets closed as it becomes unreferenced.