d67ca28354
rustdoc: Stabilize `edition` annotation. The rustdoc `edition` annotation is currently ignored on stable. This means that the tests will be ignored, unless there is a `rust` annotation, then it will use the global edition. I suspect this was just an oversight during the edition stabilization, but I don't know. Example: ```rust /// ```edition2018 /// // This code block was ignored on stable. /// ``` /// ```rust,edition2018 /// // This code block would use whatever edition is passed on the command line. /// ``` ``` AFAIK, it is not possible to write a test that verifies stable behavior, as all tests appear to set RUSTC_BOOTSTRAP which forces all tests to run as "nightly", even on a stable release. Closes #65980
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