Update README.md

Author: brendaweles

unittest-mock/README.md

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 This folder contains code examples related to the RealPython tutorial on [Understanding the Python Mock Object Library](https://realpython.com/python-mock-library/).
 
-The example code showcases some of the different use cases of `unittest.mock` in a single test file, `test_my_calendar.py`. When writing your own tests, keep in mind that readability counts and that your test code will be better readable if you keep one consistent approach to mocking.
+The example code showcases some of the different use cases of `unittest.mock` in a single test file, `test_my_calendar.py`. When writing your own tests, keep in mind that readability counts and that your test code will be more readable if you keep one consistent approach to mocking.
 
 ## Installation