fix Issue 9232 - Parsing error on some templated methods calls
fix Issue 8959 - IsExpression should support syntax which has no Identifier in all cases
Add implicit symbols section to lex.dd

Having string in the keywords list didn't sit well with me, so I ended
up breaking it out and adding the others as well.  Also added two more
of the double-underscore keywords (that don't appear to otherwise have
documentation).
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?
Document escape feature for ddoc.
Remove strong typedef from feature list.
Merge pull request #275 from AndrejMitrovic/ComparisonUpdate

Remove strong typedef from comparisons page.
Various fixes to the "Converting C to D" page.
Merge pull request #276 from AndrejMitrovic/ConvCToD

Various fixes to "Converting C to D" page
fix TemplateMixin grammar
Merge pull request #278 from 9rnsr/fix_mixin

fix TemplateMixin grammar
Merge pull request #272 from AndrejMitrovic/DocumentEscapes

Document escape feature for ddoc.
Merge pull request #269 from Wyatts/predef

Add implicit symbols section to lex.dd
Remove HTML embeding feature from spec.
Merge pull request #285 from AndrejMitrovic/RemoveHtml

Remove HTML embeding feature from spec.