Describes the cause and action for error messages.
Error Message(English)：
gitignore not working
.gitignore not working in github for mac program - Stack Overflow
https://stackoverflow.com/questions/14450644/gitignore-not-working-in-github-for-mac-program
GitHub not respecting .gitignore?
https://stackoverflow.com/questions/51829668/github-not-respecting-gitignore
Why are ignored files not being ignored?
https://stackoverflow.com/questions/42517969/why-are-ignored-files-not-being-ignored
Ignore files that have already been committed to a Git ...
https://stackoverflow.com/questions/1139762/ignore-files-that-have-already-been-committed-to-a-git-r・・・
.gitignore not working after adding it to already modified repo ...
https://stackoverflow.com/questions/11680035/gitignore-not-working-after-adding-it-to-already-modifi・・・
Jonathan Channon Blog - .gitignore not working ? fixed!
http://blog.jonathanchannon.com/2012/11/18/gitignore-not-working-fixed/
.gitignore not working - Randall Kent
http://www.randallkent.com/2010/04/30/gitignore-not-working/
.gitignore not working on folder ・ Issue #172 ・ standard/standard ・ GitHub
https://github.com/standard/standard/issues/172
Pattern-based exceptions in .gitignore not working ・ Issue ... - GitHub
https://github.com/libgit2/libgit2/issues/3224