Sync with 28c906c
Sync with 28c906c

Synced with angular/angular.io chalin-dart-beta-18-0720 branch, commit 28c906c:
https://github.com/chalin/angular.io/tree/28c906c3f2308c3a46cf8e5c36a08971a6a039d2/public/docs/_examples/template-syntax/dart

angular-examples/template-syntax,googlearchive/template-syntax,angular-examples/template-syntax,googlearchive/template-syntax