ajaxorg/ace — pull request #1918 by rmsmith (2014-04-20 16:23:54+00:00)
Title: dart_highlight_rules : add `assert` to `keywordControl`

"assert" is a reserved word and a statement in the Dart language (as
opposed to a built-in function call) as described in the spec:

https://www.dartlang.org/docs/spec/latest/dart-language-specification.html#h.cb5i0axenow6