pandoc/test/command/1718.md

% pandoc -t native
Note[^1].

[^1]: the first note.

[^2]: the second, unused, note.
^D
[WARNING] Note with key '2' defined at line 5 column 1 but not used.
[ Para
    [ Str "Note"
    , Note [ Para [ Str "the first note." ] ]
    , Str "."
    ]
]