git – How to create development branch from master on GitHub – Stack Overflow https://stackoverflow.com/questions/39478482/how-to-create-development-branch-from-master-on-github/63948857?utm_source=pocket_saves
xcode – Git is not working after macOS Update (xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools) – Stack Overflow https://stackoverflow.com/questions/52522565/git-is-not-working-after-macos-update-xcrun-error-invalid-active-developer-pa/52522566#52522566
Don’t Mess with the Master: Working with Branches in Git and GitHub – The New Stack https://thenewstack.io/dont-mess-with-the-master-working-with-branches-in-git-and-github/
What does “@@ -1 +1 @@” mean in Git’s diff output? – Stack Overflow https://stackoverflow.com/questions/10950412/what-does-1-1-mean-in-gits-diff-output
Some basic Git instructions for Github for Mac and the command line https://gist.github.com/albatrocity/1201187
How to install Xcode, Homebrew, Git, RVM, Ruby & Rails on Mac OS X (from Snow Leopard to Yosemite) – Moncef Belyamani http://www.moncefbelyamani.com/how-to-install-xcode-homebrew-git-rvm-ruby-on-mac/#step-2