1.3.1 Installation and Setup

The .gitignore file in Listing 1.6 is a good start, but for convenience
and security (Listing 3.2) I recommend using Listing 1.7 instead. This
augmented .gitignore arranges to ignore Rails documentation files, Vim
and Emacs swap files, and (for OS X users) the weird .DS_Store
directories created by the Mac Finder application.