Created by: tjlaboss

In openmc/mesh.py, the method Mesh.__eq__() contains the following statement:

elif self._lower_left != mesh2.lower_left and self._upper_right != mesh2.upper_right:

This results in a ValueError: "The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()". Using .all() for the comparison of these lists fixes the error.