git-review is a tool for reviewing diffs in a git repository.
It provides a simple CLI for stepping through the modified files, and viewing
the differences with an external diff tool. This is very convenient if you
prefer using an interactive side-by-side diff viewer. Although you could also
use the GIT_EXTERNAL_DIFF environment variable with git diff,
git-review provides much more flexibility for moving between files and
selecting which versions to diff.