luaX_newstring
seminfo->ts = luaX_newstring(ls, luaZ_buffer(ls->buff) + (2 + sep),
seminfo->ts = luaX_newstring(ls, luaZ_buffer(ls->buff) + 1,
ts = luaX_newstring(ls, luaZ_buffer(ls->buff),
LUAI_FUNC TString *luaX_newstring (LexState *ls, const char *str, size_t l);
new_localvar(ls, luaX_newstring(ls, name, sz));
luaX_newstring(ls, getstr(ts), ts->tsv.len);