GRAMMAR sections should be indented with 4 spaces.
Use $(OPT) instead of $(SUBSCRIPT $(I opt)))
Merge pull request #273 from 9rnsr/fix_trivials

Fix trivials
fix Issue 9503 - [grammar] template declaration/instance must take one or more arguments?

- Define TemplateParameters and TemplateArguments, and use them as like Parameters
- Function template and template constructor also couldn't take zero template parameters.
  Moreover, DeclarationSuffix had been wrong, because TemplateParameterList does not have both side parenthesis.
Clean up TemplateMixin nonterminal symbol definition
Merge pull request #274 from 9rnsr/fix9503

Issue 9503 - [grammar] template declaration/instance must take one or more arguments?
Remove strong typedef from feature list.
Merge pull request #275 from AndrejMitrovic/ComparisonUpdate

Remove strong typedef from comparisons page.
Merge branch 'dlang.ddoc', remote-tracking branch 'upstream/master' into dlang.ddoc