## Draft 2.0

* Match the name `type` case-insensitively when checking for invalid functions.

* Don't allow indent tokens after `%` even if it would complete a statement.

* Consider `attr()` calls to be special numbers now that they can be return
  numbers in CSS and not just strings.

## Draft 1.1

* Add `type` to the list of forbidden function names.

* Define the deprecation process for forbidding `type` functions.

## Draft 1

* Initial draft.
