anchor.diff:  
   First, we update all versions in `antora.yml`:
   
  -* Update all `antora.yml` files, eg using an IDE:
  -+
  -** `version: latest` -> `version: {page-isisrel}`
  +* Update all `antora.yml` files:
  ++
  +[source,bash,subs="attributes+"]
  +----
  +find . -name antora.yml -exec sed -i 's/latest/{page-isisrel}/g' {} \;
  +----
   
   * Commit all these changes:
   +
  
positive.code: ** update any mention of `latest` -> `{page-isisrel}`
  +
  This should be in hyperlinks, `<a href="docs/...">`
  
  * Now update `site.yml`
  +
  
negative.code: 
  * Update the home page of the website, `antora/supplemental-ui/index.html`
  +
  
  ** update any mention of `master` -> `{page-isisrel}`
  +
  