Fix formatting

Author: rlskoeser

README.md

@@ -55,14 +55,15 @@ pre-commit install
 ```
 
 ### Run unit tests
-```
 Tests can be run with either `tox` or `pytest`.  
 
 To run all the tests in a single test file, use pytest and specify the path to the test: `pytest tests/test_dateformat/test_base.py`
 
 To test cases by name, use pytest: `pytest -k test_str`
+
 ### Create documentation
-```
+
+```sh
 tox -e docs
 ```