40 columns                              |
>>> Indent line comment in body.
### Note: The old formatter had a special rule that line comments starting at
### column 1 would not be indented even if the surrounding code otherwise
### required it. The new style deliberately does not have that rule.
main() {
// comment
{
// block
{
// nested
}
}
}
<<<
main() {
  // comment
  {
    // block
    {
      // nested
    }
  }
}