Formatting bug remove interpolation braces when inside a function and selectorSeparator is new line

[fabien-michel]

This very specific condition make formatting remove part of code.

Exemple:

Formatting option: selectorSeparator: "\n"

header-title(n) {
  h{n}
  .h{n} {
    font-family: var(--font-title);

    {block};
  }
}

Format to:

header-title(n) {
  h;

  .h{n} {
    font-family: var(--font-title);

    {block};
  }
}

Note that the braces on the first selector are removed

This does not occur when this code is outside a function:

h{n}
.h{n} {
  font-family: var(--font-title);

  {block};
}