docs: Add inverted/negated example
docs: Add inverted/negated example

Suggested-by: Muescha <a8a6ee832322a5e77cc82a6c8292271e602a9542@users.noreply.github.com>
Signed-off-by: Kevin Locke <ffb4761cba839470133bee36aeb139f58d7dbaa9@kevinlocke.name>

kevinoid/git-branch-is,kevinoid/git-branch-is,kevinoid/git-branch-is