An edit matched the literal '## Unreleased' inside a backticked phrase in a prose bullet and spliced a whole new section into the middle of it, splitting the sentence in half. The release body IS this file, so that would have shipped to every user. Tests now assert: no empty version section, versions descend, no heading is indented inside a list item, and every bullet's bold phrases are balanced (ignoring code spans -- '*args, **kwargs' is a literal, not markup).