Error saving comments

[Ulyanov-programmer]

Hello!

While using your plugin, I noticed the following:

If attach a comment to a rule, regardless of whether it is embedded in another one or not, it will be displayed correctly.
(note that the preserveEmpty parameter is true)

Example

p {
  a {
    /* Text */
  }
}

/* to */

p {}

p a {
  /* Text */
}

However, if a comment is nested in a rule that has a different rule inside, it will not be nested:

Example

p {
  /* P Text */
  a {
    /* Text */
  }
}

/* to */

p {}

/* P Text */
p a {
  /* Text */
}

But it was expected:

p {
  /* P Text */
}

p a {
  /* Text */
}

[ai]

Positioning comments right in all cases is too hard for me. So if you want to fix it, you need to send PR.

[Ulyanov-programmer]

Done.
#163