.gitignore file should include .cache/

@vu.tran

Please move this post out of the Feature Requests category into the “Bugs” category.

See this post.

This post proves that a .gitignore without .cache/ causes a difficult problem to users.

Do you still think this is a feature request by kazurayam? No, it isn’t. I am reporting a bug with high risk of causing problem to users.