asciidoc-0.1: test/asciidoctor/floating_title/level4.test

[discrete]
===== Discrete Title Level 4
>>>
Document
  { docMeta =
      Meta
        { docTitle = []
        , docTitleAttributes = Nothing
        , docAuthors = []
        , docRevision = Nothing
        , docAttributes = fromList [ ( "sectids" , "" ) ]
        }
  , docBlocks =
      [ Block
          mempty
          Nothing
          (DiscreteHeading
             (Level 4) [ Inline mempty (Str "Discrete Title Level 4") ])
      ]
  }