Small issue with css minification

Hello,
Here’s the issue – css minification algorithm removes spaces in “content” property of “:after” and “:before” pseudo-element.
For example, I have such css rule:
.link-wrapper a:before{content:"Click for Download";}
After enabling css minification, “content” text becomes as “ClickforDownload” – without spaces.
I hope you will fix that issue when you’ll have some free time, and thank you for this amazing plugin! ??