1. Add CI test for building documentations (Do not ignore warnings and add spellcheck).
2. Fix docstrings with incorrect/inconsistent Sphinx format. Currently, such issues are treated as warnings in the docs building.

https://github.com/minimaxir/gpt-2-simple/blob/ca6bc61d958fd4c474af9a412ace27279b88dd90/gpt_2_simple/src/encoder.py#L8

According to the docs the lru_cache decorator uses memozation to speed up a function call when it's called with the same arguments.

But this function doesn't need any arguments...

The generated article already uses a headline as a prompt, but it ignores anything already written in the article section when generating. I think it would be a good addition to allow users to write the first paragraph or so of the article in addition to the headline -- perhaps as a separate field? Is this possible?

谢谢分享
@imcaspar 能写一下怎样使用吗?

1. 使用该模型继续进行预训练的步骤
2. 使用该模型进行inference的步骤

谢谢