Linter Changelog note fixes.
Linter Changelog note fixes.

Follow-up from: https://github.com/dart-lang/sdk/commit/a2fdeaaa5371748457d3b9acf699687c6e8606e7#r41273696



Change-Id: Ife82a2ae2ff2f5707995ae405d9c6e5daa8c45c0
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/157862
Reviewed-by: Brian Wilkerson <1f7641b6b14c52b9163524ab8d9aabff80176f21@google.com>
Commit-Queue: Phil Quitslund <3faecbdd7b7be83f493f037bf1d597e6bb9d0848@google.com>

dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk