Fix unstable formatting of labeled statements with comments (#6984 by @clement26695)
// Input
loop1:
//test
const i = 3;
// Prettier stable (first output)
loop1: //test
const i = 3;
// Prettier stable (second output)
//test
loop1: const i = 3;
// Prettier master (first output)
//test
loop1: const i = 3;