While generating the docs, when a `<code>` element is inspected for
auto-linking, the `autoLinkCode` Dgeni post-processor will break its
contents up into words and generate text nodes for those words that
should not be auto-linked.
Previously, our text node visitor would visit these generated text nodes
and try to auto-link them too. As a result, it would unnecessarily
process nodes that had already been checked (and could potentially
generate links that would otherwise be ignored).
You can see an occurrence of this issue in the
[Create the product list][1] section of the
"Getting started with Angular" tutorial (look for `<a>`).
This commit fixes this by ensuring the visitor will skip the current
node and any nodes generated by `autoLinkCode`.
[1]: https://v11.angular.io/start#create-the-product-list
PR Close#41709
de19b8bb88