fix: whitespace before punctuation

[luoxiaozero]

div >:deep(h3) {
    color: orange;
}

error render:

div.test .test>h3{color: orange;}

should be:

div.test>h3{color: orange;}

[abishekatp]

I think this problem is happening when we use style_sheet! macro without formatting css file using some IDE tools. because for me this problem was not happenning in styel_sheet! macro because IDE auto eliminates this unwanted spaces. I will merge this and also check whether there are some other cases like this.

[luoxiaozero]

ok