https://github.com/raphlinus/pulldown-cmark/pull/522
というわけで、ワイが勃起しながら仕上げたコードのおかげでそのうち mdbook とかでセクション ID を指定できるようになるはずやぞ (https://github.com/rust-lang/mdBook/issues/1141)
泣いて喜べ
GitHubSupport heading attribute block (especially ID and classes) by lo48576 · Pull Request #522 · raphlinus/pulldown-cmarkTODO
Support ID ({#id})
At this stage, {.class} is simply ignored.
Enable attribute block support only when the specific parser option is enabled
I'll use the name Options::ENABLE_HEADIN...