6 background: url(wiki.png);
10 background: url(unknown.png);
14 background: url(https://example.org/foo.png);
15 background: url('https://example.org/foo.png');
16 background: url("https://example.org/foo.png");
21 background: url(wiki.png);
26 background: url(circle.svg);
31 background: url(wiki.png), url(wiki.png);