Add comment to pb12
@@ -87,7 +87,7 @@ int main()
prev[1] = byte;
if (bits >= 8) {
uint8_t outctl = control >> (bits - 8);
- assert(outctl != 1);
+ assert(outctl != 1); // 1 is reserved as the end byte
write_all(STDOUT_FILENO, &outctl, 1);
write_all(STDOUT_FILENO, literals, literals_size);
bits -= 8;
