Dart Editor has a new build. This is a significant release with a long list of breaking changes. You are urged to update your Dart code accordingly.
Due to popular demand, the Dart team brought back the plus operator for string concatenation. That change has now landed in the Editor. Before this release, using + to concatenate strings produced this
Now, you can use + for concatenation. The concat() method has been deprecated:
There are numerous other changes in the core libraries, the dart:html library, and the dart:io library.
Eric Clayberg fills us in on the details of this release: