templates:copy-node is missing from the HTML Templating module docs

[duncdrum]

templates:copy-node is a real, public function in the html-templating package (confirmed in the installed 1.2.1 package's templates.xqm), but it's missing from the "Pre-defined Template Commands" section of the templating docs page, which otherwise documents templates:include, lib:include, templates:each, templates:if-parameter-set/if-parameter-unset, templates:surround, templates:form-control, templates:load-source (removed), and lib:parse-params.

Signature and current behavior, from templates.xqm:

declare function templates:copy-node($node as element(), $model as item()*) {
    element { node-name($node) } {
        $node/@*,
        templates:process($node/*, $model)
    }
};

A couple of behaviors worth documenting explicitly, since they're easy to get wrong without reading the source (I initially assumed both, incorrectly, before checking):

• It does not filter @data-template/@data-template-* attributes from the copied node the way templates:process-children/wrapped functions do via templates:filter-attributes - they pass through into the output verbatim.
• It only recurses into element children ($node/*), not all child nodes - text/comment children of the calling element are dropped, not just re-processed.