+++++++++++++++++++
Features:
- [apispec.ext.marshmallow]: Generate "enum" property with single entry
when the ``validate.Equal`` validator is used (:issue:`155`). Thanks
:user:`Bangertm` for the suggestion and PR.
Bug fixes:
- Allow OPTIONS to be documented (:issue:`162`). Thanks :user:`buxx` for
the PR.
- Fix regression from 0.25.3 that caused a ``KeyError`` (:issue:`163`). Thanks
:user:`yoichi`.