Add new and cleanup old keywords.
Add some new operators.
Format the regexs for the indentation rules.
Match lines only containing ‘{}’ as “increase indent for next line”.

This is to make typing more natural in TextMate 2, which does “indent as you type”.
Indent when pressing return inside braces.
Add tag helpers.
Add link_to helper.
Add link_to_txmt helper.
Add "link_to_error" helper.

* Added append_class! helper
* By default content_tag doesn't escape content received from the block
* link_to_txmt accepts a block
Move the tag_options and append_class! helpers to a new module.

Also add specs for append_class!.
Temp