We delete all branches that do not contain 'main' in their name, really, we should delete all branches except for 'main'. We can acheive this with some more clever grep invocations that look for whitespace surrounding 'main'.
Pull request: https://github.com/WebKit/WebKit/pull/7277
Committed 257512@main (6cb8ac992759): <https://commits.webkit.org/257512@main> Reviewed commits have been landed. Closing PR #7277 and removing active labels.
<rdar://problem/103091911>