Add a regression test for #514
Add a regression test for #514

be9/redcarpet,kaneshin/redcarpet,emq/redcarpet,liquorburn/redcarpet,vmg/redcarpet,kaneshin/redcarpet,emq/redcarpet,fukayatsu/redcarpet,fukayatsu/redcarpet,increments/greenmat,Hacker0x01/redcarpet,increments/greenmat,Hacker0x01/redcarpet,Hacker0x01/redcarpet,fukayatsu/redcarpet,emq/redcarpet,fukayatsu/redcarpet,Hacker0x01/redcarpet,liquorburn/redcarpet,be9/redcarpet,kaneshin/redcarpet,be9/redcarpet,increments/greenmat,vmg/redcarpet,liquorburn/redcarpet,kaneshin/redcarpet,emq/redcarpet,liquorburn/redcarpet,vmg/redcarpet,increments/greenmat,be9/redcarpet,vmg/redcarpet