rustdoc book: html_playground_url is underdocumented #141414
Description
Location
https://doc.rust-lang.org/rustdoc/write-documentation/the-doc-attribute.html#html_playground_url
Summary
looking at the CodeBlocks::next impl in src/librustdoc/html/markdown.rs, we also pass version=nightly sometimes (when there are feature flags), but the rustdoc book says we only pass code and edition.