Don't use an error message as a name in checkNotNullable.

One message is enough.

Change-Id: I0d1b6d98af9f5815f810edc4bd13f46a676ddfda
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/137780
Reviewed-by: Erik Ernst <eernst@google.com>
Commit-Queue: Lasse R.H. Nielsen <lrn@google.com>

https://dart.googlesource.com/sdk/+/043d08a6b1614bf42834b8ae90991415ffa99e7f
1 file changed
tree: f85b0ae3c6896fe179b65796d79db3ac9cc57bd3
  1. commits.json