there's no '>>>=' operator in Dart
no more interfaces in dart, WEB-9949 Dart: remove interface from completion
Strings parsing fixed, +EA-51721
numeric literals parsing as in spec
WEB-10018 Nested comments in Dart
WEB-10178 Dart: Missing option to run Pub Get
No need in Dart icon on the main toolbar
WEB-10190 Dart Command Line Launcher not working