391212f3da
The augmentations feature has been modified over a period of time. This CL introduces the associated grammar changes into the specification grammars. Change-Id: Iaa4cdd4c3ffea26ac327265468d68fae59efb2fd Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/467840 Reviewed-by: Johnni Winther <johnniwinther@google.com> Commit-Queue: Erik Ernst <eernst@google.com>