Compilation error; in css there is a gap before ::after and ::before

[mia@design4u2.se]

I have this error when I'm nesting styles in scss. Dreamweaver puts a gap between the stylename and ::before and ::after. I don't know how to get through this. Anyone could help?
Example:
IN SCSS

.page-wrapper{
         width:80%;
         margin:0 auto;
         ::after{
              content: " ";
              display: block;
              clear: both;
         }
}

IN CSS
.page-wrapper {
        width: 80%;
        margin: 0 auto; }
.page-wrapper ::after {
       content: " ";
       display: block;
       clear: both; }

There is a gap between the r and : (marked in red). How do I fix this? I know I can put it in an ordinary css style in scss but I want to solve this properly.

[Jon Fritz · Accepted solution]

Bug reporting can be done here: https://dreamweaver.uservoice.com/forums/382851-adobe-dreamweaver-bugs

It's possible someone has already brought up the issue, lending your voice to their report will help prioritize issues for the Dev Team. If it hasn't been brought up, start a new report. make sure to include all steps to replicate the problem so Adobe knows what's going on.