Found by documenting it. `_notes_for` stripped `-----BEGIN PGP SIGNATURE-----`
from an annotated tag's contents and nothing else, and which header appears
depends on `gpg.format`: `openpgp` writes that one, `ssh` writes
`-----BEGIN SSH SIGNATURE-----`. This repository signs with an SSH key, so the
first signed release tag would have rendered its whole signature block as the
release notes on the update page.
`%(contents:subject)` and `%(contents:body)` would have avoided the question,
and would also have thrown away every blank line in a body written as a list --
which is what release notes are.
The suite caught the other half of the same change: `tag.gpgSign` makes a bare
`git tag <name>` behave as `-s`, so the lightweight tags a test was making now
wait for an editor it does not have.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
