Use latest pandoc in render-readme workflow#1175
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The default pandoc shipped with setup-pandoc@v2 (3.1.11) renders consecutive HTML comments without separating blank lines, while recent pandoc (3.9.x) inserts them. This drift produced repeated "Update README" PRs whenever a locally-rendered README.md (with blank lines) was committed and CI then re-rendered without them. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
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CLAUDE: ## Summary
r-lib/actions/setup-pandoc@v2topandoc-version: 'latest'in the render-readme workflow.Why
The default pandoc that ships with
setup-pandoc@v2is 3.1.11. That version renders consecutive HTML comments without separating blank lines, but pandoc 3.9.x (current Homebrew) inserts blank lines between them when emitting GFM. Concretely, the all-contributors block inREADME.Rmd:```
```
renders to stacked comments under CI but to blank-line-separated comments under recent local pandoc. Anytime a locally-rendered
README.mdlands on main (e.g. commit d109d3f bundled one alongside an Rbuildignore edit), the next CI render produces a diff and opens an "Update README" PR (e.g. #1173, #1165) that just removes those blank lines. Bumping CI tolatestends the cycle for any reasonably current local install.Test plan