git history says it's been (kinda?) official since 2009: https://github.com/git/git/commit/69fb8283937a18a031aeef12ea2a530c8ccf3e83 https://github.com/git/git/

git history says it's been (kinda?) official since 2009: https://github.com/git/git/commit/69fb8283937a18a031aeef12ea2a530c8ccf3e83 https://github.com/git/git/commit/69fb8283937a18a031aeef12ea...