Highlighting extension not preserving whitespace in <pre> tag

[khushmeeet]

I am using gold mark highlighting extension in my go code like this.

highlighting.NewHighlighting(
    highlighting.WithStyle("monokai"),
),

and i define code in markdown this way

```json
{
  "site_title":"test",
  "email":"hello@flux.com",
  "twitter_username":"@test",
  "github_username":"test",
  "minify_css": true,
  "minify_html": true,
  "list": [
    "1",
    "2",
    "3"
  ],
  "map": {
    "a": 1,
    "b": 2
  }
}
```

After the rendering my formatted code block does not take whitespace or newlines into account and displays HTML like this.

Not sure, if this is a bug or I am missing some config option!

My full gold mark instantiation looks like this.

md := goldmark.New(
		goldmark.WithExtensions(meta.Meta,
			highlighting.NewHighlighting(
				highlighting.WithStyle("monokai"),
			),
			extension.Footnote,
			extension.GFM,
			emoji.Emoji,
			mathjax.MathJax,
		),
		goldmark.WithRendererOptions(
			html.WithHardWraps(),
		),
		goldmark.WithParserOptions(
			parser.WithBlockParsers(),
			parser.WithAttribute(),
		),
	)

[yuin]

This seems a problem related your own CSS.