anchor.diff:  
     Those developers may still use HTML 5 URLs by taking two remedial steps:
   
  -  1. Provide the router with an appropriate `APP_BASE_HREF` value.
  +  1. Provide the router with an appropriate [APP_BASE_HREF][] value.
     1. Use _root URLs_ for all web resources: css, images, scripts, and template html files.
   
  -.l-sub-section
  -  :marked
  -    Learn about the [APP_BASE_HREF](../api/common/index/APP_BASE_HREF-let.html)
  -    in the API Guide.
  +  [APP_BASE_HREF]: ../api/common/index/APP_BASE_HREF-let.html
   
   :marked
     ### *HashLocationStrategy*
  
positive.code: 
    Here's the *Crisis Center* URL in this "HTML 5 pushState" style:
  
  code-example(format=".", language="bash").
    localhost:3002/crisis-center/
  
  :marked
  
negative.code:   Routers can take advantage of this exception by composing in-application route
    URLs with hashes.  Here's a "hash URL" that routes to the *Crisis Center*
  
  code-example(format="nocode").
    localhost:3002/src/#/crisis-center/
  
  :marked
  