@mixin word-wrap($wrap: break-word) {
  word-wrap: $wrap;

  @if $wrap == break-word {
    overflow-wrap: break-word;
    word-break: break-all;
  }
}

@mixin word-wrap($wrap: break-word) {
  overflow-wrap: $wrap;
  word-wrap: $wrap;

  @if $wrap == break-word {
    word-break: break-all;
  } @else {
    word-break: $wrap;
  }
}

Allow word-wrap add-on to be reset to normal
Allow word-wrap add-on to be reset to normal

- Fixes #556
