Support one comment for multiple items

[danoc]

This comment relates to all the classes below it. There should be a way to indicate this.

/// Flex classes

.flex {
  @include display(flex);
}

.flex-1 {
  @include flex(1);
}

.flex-none {
  @include flex(none);
}

.flex-wrap--wrap {
  @include flex-wrap(wrap);
}

[danoc]

This is done. Comments will contain everything below it until it finds another comment or a special /// --- comment.