unquote file.txtar
txtar-x -C x/y file.txtar
cmp x/y/foo expect/foo
cmp x/y/a/b/bar expect/a/b/bar

-- file.txtar --
>some comment
>
>-- foo --
>foo
>-- a/b/bar --
>bar
-- expect/foo --
foo
-- expect/a/b/bar --
bar