2 failures:
  @44 (⟨4, 28⟩): expected token
    ""
  @44 (⟨4, 28⟩): unexpected end of input; expected '![', '$$', '$', '[' or '[^'
    ""

Final stack:
  (Lean.Doc.Syntax.para
   "para{"
   [(Lean.Doc.Syntax.role
     "{"
     <missing>
     "["
     [(Lean.Doc.Syntax.footnote <missing>)]
     "]")])