CSS Compressor: Invalid whitespace removal / @supports () "or" ()

[melloware]

original Issue: yui/yuicompressor#340

Raw:

.foo {
    @supports (backdrop-filter: blur(10px)) or (-webkit-backdrop-filter: blur(10px)) {
        background: rgba(69, 69, 69, 0.5);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
      }
}

Incorrectly compressed to:

.foo {
    @supports (backdrop-filter: blur(10px)) or(-webkit-backdrop-filter: blur(10px)) {
        background: rgba(69, 69, 69, 0.5);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
      }
}

No space after the or causes issues in Chrome