https://github.com/sloria/sphinx-issues/blob/f95baf603549429843efdffb7b6c62891604ea97/src/sphinx_issues/__init__.py#L175 causes our link to e.g., https://github.com/zarr-developers/numcodecs not to work. Could this regex be loosened a bit?
sphinx-issues/src/sphinx_issues/__init__.py
Line 175 in f95baf6