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

image::sunset.jpg[Shining sun, 300, 200]
>>>
Document
  { docMeta =
      Meta
        { docTitle = []
        , docTitleAttributes = Nothing
        , docAuthors = []
        , docRevision = Nothing
        , docAttributes = fromList [ ( "sectids" , "" ) ]
        }
  , docBlocks =
      [ Block
          mempty
          Nothing
          (BlockImage
             (Target "sunset.jpg")
             (Just (AltText "Shining sun"))
             (Just (Width 300))
             (Just (Height 200)))
      ]
  }