fix minor issue

Xuefeng-Zhu · web-flow · commit b649a6a34e3b · 2016-08-22T16:58:28.000-05:00
diff --git a/graph_search.py b/graph_search.py
@@ -38,7 +38,7 @@ def find_shortest_path(self, start, end, path=None):
         path = path or []
         path.append(start)
 
-        if self.start == self.end:
+        if start == end:
             return path
         shortest = None
         for node in self.graph.get(start, []):
