:icons:
icon:download[link="http://rubygems.org/downloads/asciidoctor-1.5.2.gem"]
>>>
Document
  { docMeta =
      Meta
        { docTitle = []
        , docTitleAttributes = Nothing
        , docAuthors = []
        , docRevision = Nothing
        , docAttributes =
            fromList [ ( "icons" , "" ) , ( "sectids" , "" ) ]
        }
  , docBlocks =
      [ Block
          mempty
          Nothing
          (Paragraph
             [ Inline
                 Attr
                 ( []
                 , fromList
                     [ ( "link"
                       , "http://rubygems.org/downloads/asciidoctor-1.5.2.gem"
                       )
                     ]
                 )
                 (Icon "download")
             ])
      ]
  }