v1.6.1 Allow <a id=""></a> as internal link target
Allowing eg <a id="card-background-colour-cardcolour"></a>
as an internal hyperlink target means links work consistently with GitHub's naming convention (if you use the right anchor id format).
Allowing eg <a id="card-background-colour-cardcolour"></a>
as an internal hyperlink target means links work consistently with GitHub's naming convention (if you use the right anchor id format).