Support to ignore a block

Considering the following example:

```html

My paragraph with a link (

see here

).

The extra whitespace between the closing of the anchor and the parenthesis are an issue for us, it's creating an extra space, when viewed as HTML. Could there be an option, maybe a comment, that would disable the formatting for a specific block?

Out of scope? I let you be the judge.

I can also do a PR if you're interested.

Start by reviewing how the HTML formatter processes whitespace around nested elements and whether it already recognizes comments or configuration options. Define how an ignore marker or option should scope a block, then verify that the example preserves the intended spacing without changing formatting elsewhere.

Written by the indexing model from the issue text.