html_generator refactoring to use finals, fewer properties
html_generator refactoring to use finals, fewer properties

astashov/dartdoc,keertip/dartdoc,dart-lang/dartdoc,astashov/dartdoc,keertip/dartdoc,dart-lang/dartdoc,dart-lang/dartdoc,astashov/dartdoc,keertip/dartdoc,keertip/dartdoc,astashov/dartdoc,dart-lang/dartdoc