CSS selector for wildcard classes does not work

this is valid CSS
```css
code[class*="language-"],
pre[class*="language-"] {
color: black;
}
```

Matches

```html
xyz
````

HTML-Renderer ignores it.

Start by reproducing the issue with the CSS and HTML snippets in the report, then trace HTML-Renderer's CSS selector matching for attribute selectors. Done means selectors using [class*="language-"] correctly match the shown code and pre elements and apply the declared color.

Written by the indexing model from the issue text.