js backend: fixed @import markdown syntax and a main tagged code block followed by unnamed blocks that are to be appended to the main block. note: a tag like `@foo.js` because it ends with `.js` will be transpiled on its own and not merged with unnamed blocks.
js backend: fixed @import markdown syntax and a main tagged code block followed by unnamed blocks that are to be appended to the main block.
note: 0c1122080bc815efc9a1754d5fd38ab8869f4d99@foo.js` because it ends with `.js` will be transpiled on its own and not merged with unnamed blocks.

rusthon/Rusthon,rootfs/Rusthon,pombredanne/Rusthon,secureosv/pythia,tempbottle/Rusthon,pombredanne/Rusthon,secureosv/pythia,pombredanne/Rusthon,tempbottle/Rusthon,rusthon/Rusthon,rusthon/Rusthon,tempbottle/Rusthon,secureosv/pythia,tempbottle/Rusthon,rusthon/Rusthon,tempbottle/Rusthon,rootfs/Rusthon,rootfs/Rusthon,secureosv/pythia,secureosv/pythia,pombredanne/Rusthon,pombredanne/Rusthon,rootfs/Rusthon,rootfs/Rusthon,rusthon/Rusthon