asciidoc-0.1: test/asciidoctor/inline_footnote/xref-unresolved.test

A bold statement.footnoteref:[foobar]
>>>
Document
  { docMeta =
      Meta
        { docTitle = []
        , docTitleAttributes = Nothing
        , docAuthors = []
        , docRevision = Nothing
        , docAttributes = fromList [ ( "sectids" , "" ) ]
        }
  , docBlocks =
      [ Block
          mempty
          Nothing
          (Paragraph
             [ Inline mempty (Str "A bold statement.")
             , Inline mempty (Footnote (Just (FootnoteId "foobar")) [])
             ])
      ]
  }