CSS Compressor: Space before :psuedo selectors is removed

[melloware]

Original Issue: yui/yuicompressor#334

@media screen and (-ms-high-contrast: none) {
    body :focus {
      outline: 2px solid #5e9ed6;
    }
}

The space before : is removed and changing the selector.

@media screen and (-ms-high-contrast: none) {
    body:focus {
      outline: 2px solid #5e9ed6;
    }
}

The space before : should not be removed.

[melloware]

yui/yuicompressor#248