This git commit style is really helpful.
Makes easier to filter only what is important or to generate changelog automatically.

Karma commits
Prepend one of these to your commit.

feat: (new feature)
fix: (bug fix)
docs: (changes to documentation)
style: (formatting, missing semi colons, etc; no code change)
refactor: (refactoring production code)
test: (adding missing tests, refactoring tests; no production code change)
chore: (updating grunt tasks etc; no production code change)