40 columns                              |
>>> no trailing whitespace before initializer comment
class A {
  A()
      // comment
      : field = value;
}
<<<
class A {
  A()
      // comment
      : field = value;
}
>>> no trailing whitespace before initializer comment when params wrap
class A {
  A(some, very, long, parameter, list, that, wraps)
      // comment
      : field = value;
}
<<<
class A {
  A(some, very, long, parameter, list,
      that, wraps)
      // comment
      : field = value;
}