Add flake8 to CONTRIBUTING.md
@@ -18,7 +18,8 @@ geopy runs on both Python 2 and Python 3 on both the CPython and PyPy
interpreters. You should handle any compatibility in `geopy/compat.py`.
The new code should follow [PEP8](https://pep8.org/) coding style (except
-the line length limit) and adhere to the style of the surrounding code.
+the line length limit, which is 90) and adhere to the style of
+the surrounding code.
You must document any functionality using Sphinx-compatible RST, and
implement tests for any functionality in the `test` directory.
@@ -56,6 +57,11 @@ For example:
pytest test/geocoders/nominatim.py
+Before pushing your code, make sure that linting passes, otherwise Travis
+build would fail:
+
+ flake8
+
### Geocoder credentials
