At https://bugs.python.org/msg397968, I had typed GH-5194, which correctly links to python/cpython#5194.

However, the appearance of that link is suspect for two reasons:

1. When I mouse over, the tooltip text reads GitHub PR 5194: [open] bpo-21161: pdb: default: handle list comprehensions, as if to link to bpo-21161: pdb: default: handle list comprehensions cpython#15194. Note the difference of a leading 1: 15194 instead of 5194.
2. There is no strikethrough on that link, even though that pull request is merged.

This is not a major issue, but it's just a little confusing that the link is correct when the CSS implies otherwise.