<===> input.scss
:nth-of-type(2n+1),
:nth-of-type(2n+  1),
:nth-of-type(2n  +1),
:nth-of-type(2n  +  1),
:nth-of-type( 2n  +  1 )
{ color: red; }
<===> output.css
:nth-of-type(2n+1),
:nth-of-type(2n+ 1),
:nth-of-type(2n +1),
:nth-of-type(2n + 1),
:nth-of-type(2n + 1) {
  color: red;
}