以下の様な、エラーが出てしまった ※brewについてはこちらを参照 $ brew update error: The following untracked working tree files would be overwritten by merge: Library/Formula/autojump.rb Please move or remove them before you can merge. Updating 851e2e8..92144d4 Aborting Error: Failed while executing git pull origin refs/heads/master:refs/remotes/origin/master