repr method now follows convention

Author: aherrera1721

vpython/vector.py

@@ -51,7 +51,7 @@ def __str__(self):
         return '<{:.6g}, {:.6g}, {:.6g}>'.format(self._x, self._y, self._z)
 
     def __repr__(self):
-        return '<{:.6g}, {:.6g}, {:.6g}>'.format(self._x, self._y, self._z)
+        return 'vector({:.6g}, {:.6g}, {:.6g})'.format(self._x, self._y, self._z)
 
     def __add__(self, other):
         if type(other) is vector: