Redundant blanks were generated with `rowspanx`

[rinmyo]

tablex(
      columns: (auto, 1fr),
      rowspanx(2, [a\ a\ a\ a\ a]), "dfjasdfjdaskfjdsaklfj", "ddd"
    )

[PgBiel]

Fixed in 2e5f06c43d87e81b3b04c51a2254f9dca44d696d (will be out in the next release), thanks!