sending whole buffer (lua-send-buffer) cause error

often get error like:
```
> [string "print(''); luamode_loadstring('require(\'util..."]:1: unfinished string near <eof>
```
running osx, lua 5.3, emacs 27.1

I'm using lua-mode against remote machine (ios) which runs lua instance so using temporary file is not the solution.
Is it possible solve this issue please?
