specs/coauthoring-inline-editor-diff.md was accidentally tracked via a git add -A
during the #64 merge. Specs are canonical in vscode-cowriting-plugin-content
(submitted there at v0.1.1); the code-repo copy would only drift. Matches the
convention (the other coauthoring specs are not tracked here).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>