The grammar in this is a bit off. I'll probably submit a pull request with some edits, if that's something people do? I'm not sure about the etiquette surrounding grammar mistakes in a github repo.
Personally I am always thrilled to get grammar/typo fix pull requests to my projects. It means someone cared enough about the project to go through the effort of making a PR just to alleviate a small aesthetic problem!
Definitely a good habit, I think more than the 50% of Github users are not English as mother tongues, so it's good to polish documentations, or like in this case, long texts. I always accept pull-requests for grammar improvements.