anchor.diff:  ----------------------------------
   // NOTCONSOLE
   
  -This {dataframe} makes it easier to answer questions such as:
  +This {transform} makes it easier to answer questions such as:
   
   * Which air carrier has the most delays as a percentage of flight time?
   
  
positive.code: ----------------------------------
  // NOTCONSOLE
  
  This {dataframe} makes it easier to answer questions such as:
  
  * Which customers spend the most?
  
  
negative.code: ----------------------------------
  // TEST[skip:setup kibana sample data]
  
  <1> This is the destination index for the {transform}. It is ignored by
  `_preview`.
  <2> Two `group_by` fields have been selected. This means the {transform} will
  contain a unique row per `user` and `customer_id` combination. Within this
  dataset both these fields are unique. By including both in the {transform} it
  gives more context to the final results.
  
  NOTE: In the example above, condensed JSON formatting has been used for easier 
  readability of the pivot object.
  
  The preview {transforms} API enables you to see the layout of the
  {transform} in advance, populated with some sample values. For example:
  
  [source,js]
  ----------------------------------
  