False positive for unintended_html_in_doc_comment

[sigurdm]

Example:

/// `<` or `>`
foo() {}

I believe the angle brackets both are quoted.

[pq]

/fyi @kallentu

[kallentu]

Made a commit that changed the regex which matches for this lint.
Added a test for this case too, which now passes.
Should be good to close now.