anchor.diff:  [source,js]
   ------------------------------------------
   {
  +  "query": {
       "filtered": {
         "query": {
           "match": {
  
positive.code: <6> Include the `lte` clause only if `line_no.end` is specified
  <7> Fill in the value of param `line_no.end`
  
  As written above, this template is not valid JSON because it includes the
  _section_ markers like `{{#line_no}}`.  For this reason, the template
  can only be written as a string.
  
  [float]
  ===== Pre-registered template
  
  You can register search templates by storing it in the `config/scripts` directory, in a file using the `.mustache` extension.
  
negative.code:         {{/line_no}} <2>
        }
      }
    }
  }
  ------------------------------------------
  <1> Fill in the value of param `text`
  