Recommend pre-commit in Code Style section

The Code Style section discusses the use of PEP8 and autopep8. Yelp's pre-commit framework allows you to formalise the use of PEP8 in a project by ensuring that PEP8/PyFlakes is run on Python code (as well as equivalent tools for other languages like JSHint). Pre-commit is not mandatory: it is something which individual developers on a project can install if they feel like it - the pre-commit framework simply allows you to share around a common set of pre-commit scripts in a sensible way.

If it is desirable to follow "Pythonicity" in a project, it is probably a good idea to suggest people enforce it at the level of version control.

If there's interest in this, I can draft some text for inclusion and submit a PR.

从 Code Style 部分开始，尤其是其中对 PEP8 和 autopep8 的讨论，并检查当前指南如何介绍代码风格工具。完成的标准是，该部分清楚涵盖所提议的 pre-commit 建议及其可选性质，同时现有指南仍保持连贯。