asciidoc-0.1: test/asciidoctor/image/with-align.test

image::sunset.jpg[align="center"]
>>>
Document
  { docMeta =
      Meta
        { docTitle = []
        , docTitleAttributes = Nothing
        , docAuthors = []
        , docRevision = Nothing
        , docAttributes = fromList [ ( "sectids" , "" ) ]
        }
  , docBlocks =
      [ Block
          Attr
          ( [] , fromList [ ( "align" , "center" ) ] )
          Nothing
          (BlockImage (Target "sunset.jpg") Nothing Nothing Nothing)
      ]
  }