Merge pull request #7 from cclauss/patch-2

Fix typo: pont() --> point()

Author: heqin-zhu

算法基础/labs/2018-徐云/lab1/PB16030899-朱河勤-实验一.py

@@ -8,7 +8,7 @@ def __init__(self,x,y):
         self.x=x
         self.y=y
     def __neg__(self):
-        return pont(-self.x, -self.y)
+        return point(-self.x, -self.y)
     def __len__(self):
         return self.norm(2)
     def __lt__(self,p):