Vaccinate your global gitignore file
Adds .DS_Store, .Rproj.user, .Rdata, .Rhistory, and .httr-oauth to
your global (a.k.a. user-level) .gitignore. This is good practice as it
decreases the chance that you will accidentally leak credentials to GitHub.
git_vaccinate()
Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.