87a369f1d2
In this change, we also push HTML escaping to mustache. Changes can be seen in x20 pages emailed to the team. Change-Id: I239668a0844fb5bd7c90848f25a3cbf29e50363d Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/118460 Reviewed-by: Brian Wilkerson <brianwilkerson@google.com> Commit-Queue: Samuel Rawlins <srawlins@google.com>