Success! Final stack:
  [(Lean.Doc.Syntax.ul
    "ul{"
    [(Lean.Doc.Syntax.li
      "*"
      [(Lean.Doc.Syntax.para
        "para{"
        [(Lean.Doc.Syntax.text (str "\"abc\""))]
        "}")])]
    "}")
   (Lean.Doc.Syntax.para
    "para{"
    [(Lean.Doc.Syntax.text (str "\"def\""))]
    "}")]
All input consumed.