[Typo]: unittest 中的笔误

[zyf722]

Python Version

3

Docs Page

https://docs.python.org/zh-cn/3/library/unittest.html#load-tests-protocol

Original Translation

如果你希望在基类上的 setUpClass 和 tearDownClass 被调用则你必须自己云调用它们。

Original Docs Paragraph

If you want the setUpClass and tearDownClass on base classes called then you must call up to them yourself.

Suggested Fix

如果你希望在基类上的 setUpClass 和 tearDownClass 被调用则你必须自己调用它们。

[silkriver]

fixed