[refmt] for-loop functions with comments that have single unit arg have weird formatting

[kyldvs]

This (try reason link):

for (i in 0 to 1) {
  /* comment */
  print_newline()
};

Gets formatted to:

for (i in 0 to 1) {
  /* comment */
  print_newline
    ()
};

All of these are fine:

for (i in 0 to 1) {
  ();
  /* comment */
  print_newline()
};

for (i in 0 to 1) {
  print_newline()
};

for (i in 0 to 1) {
  /* comment */
  print_int(1)
};

[jordwalke]

Remaining (more rare) issue tracked here: #1781