Add tests for incorrect `closeAtx` options
Add tests for incorrect `closeAtx` options

chcokr/mdast,ulrikaugustsson/mdast,ulrikaugustsson/mdast,wooorm/remark,tanzania82/remarks,yukkurisinai/mdast,chcokr/mdast,yukkurisinai/mdast,eush77/remark,eush77/remark