rustdoc: stabilize --playground-url and deprecate --markdown-playground-url

b552900
Opened by Liigo Zhuang at 2022-01-18 22:16:11

cc https://github.com/rust-lang/rust/pull/37763 https://github.com/rust-lang/rust/pull/37911

  1. Triage: I don't think this has happened cc @GuillaumeGomez

    Steve Klabnik at 2019-12-25 16:44:47