Don't generate lines, that are longer than 128 characters

add $9, $0, 307200  ; length of string literal "\u8F\u8F\u8F\u8F\u8F\u8F\u8F\u8F\u8F\u8F\u8F\u8F\u8F\u8F\u8F\u8F\u8F\u8F\u8F\u8F\u8F\u8F\u8F\u8F\u8F\u8F\u8F\u8F\u8F\u8F\u8F\u8F\u8F\u8F\u8F\u8F\u8F\u8F\u8F\u8F ..."

The assembler issues an error (internal error: unknown instruction 'F' in line 4982), if it sees the line above, because it's longer than 128 Characters. Limiting the length of a line will fix the error.