message: Add notes about pre-stabilization to contributor unstable docs
diff: @@ -42,6 +42,32 @@ issues are filed, they can be easily tied together.
  [tracking issue]: https://github.com/rust-lang/cargo/labels/C-tracking-issue
  [tracking issue template]: https://github.com/rust-lang/cargo/issues/new?labels=C-tracking-issue&template=tracking_issue.md
  +## Pre-Stabilization
  +
  +Once an unstable feature is "complete", the search for users to test
  +and give feedback begins. Testing notes should be written up to give users an
  +idea of how to test the new feature. An example being the
  +[workspace inheritance testing notes] for workspace inheritance. Once testing
  +notes have been written up you should make posts in various rust communities
  +([rust subreddit], [users], [internals], etc). Example posts made for workspace
  +inheritance: [reddit post], [users post], [internals post]. The unstable feature
  +should also be added to [This Week in Rust]. This should be done by adding the
  +label `call-for-testing` to the RFC for the feature and making a comment with a
  +link to the testing notes and the tracking issue (as needed). If there is not an
  +RFC, a pull request should be made to the [TWiR repo] adding the feature to the
  +`Call for Testing` section ([example]).
  +
  +[workspace inheritance testing notes]: https://github.com/rust-lang/cargo/blob/6d6dd9d9be9c91390da620adf43581619c2fa90e/src/doc/src/reference/unstable.md#testing-notes
  +[rust subreddit]: https://www.reddit.com/r/rust/
  +[users]: https://users.rust-lang.org/
  +[internals]: https://internals.rust-lang.org/
  +[reddit post]: https://www.reddit.com/r/rust/comments/uo8zeh/help_test_workspace_inheritance_in_preparation/
  +[users post]: https://users.rust-lang.org/t/help-test-workspace-inheritance-in-preparation-for-stablization/75582
  +[internals post]: https://internals.rust-lang.org/t/help-test-workspace-inheritance-in-preparation-for-stablization/16618
  +[This Week in Rust]: https://this-week-in-rust.org/
  +[TWiR repo]: https://github.com/rust-lang/this-week-in-rust
  +[example]: https://github.com/rust-lang/this-week-in-rust/pull/3256
  +
  ## Stabilization
  After some period of time, typically measured in months, the feature can be
  