I forgot the last line. Done

jhonrubiagonzalez · jhonrubiagonzalez · commit 5f188ac8b9e7 · 2016-03-12T21:44:53.000+01:00
diff --git a/src/sage/graphs/graph_plot.py b/src/sage/graphs/graph_plot.py
@@ -525,6 +525,7 @@ def set_edges(self, **edge_options):
         ::
 
             sage: GP.set_edges(edge_color='black')
+            sage: GP.plot()
             Graphics object consisting of 24 graphics primitives
 
         .. PLOT::
