middleman-template/source/layouts/default.html.haml

= partial 'layouts/base', {} do
  = partial 'layouts/header'
  = partial 'layouts/aside'
  ._main
    %main
      //.border-a
      //.border-b
      .beginning_content
      = yield
      .ending_content
      //end of default
  = partial 'layouts/footer'