Regarding this PR: https://github.com/python/cpython/pull/2054
It has bpo-30266 in the title, where the PR should be linked to.
But the PR body mentions another bpo number (bpo-25958), as a result this PR is also linked to bpo-25958. This PR should only be linked to bpo-30266.
When linking bpo and GitHub PR I think it should only look at the PR title, and not the body.