//- @jadedoc
  name: pugMixin
  description: Pug mixin. This fails with the old jade (runtime)
  arguments: 
    - {type} cls - class
  attributes: 
    - {type} name - description
  examples:
    - +pugMixin('biip')

mixin pugMixin(cls)
  .beep(class="boop-"+ cls)&attributes(attributes)
    | #{cls}