anchor.diff:  === Human readable output
   
   Statistics are returned in a format suitable for humans
  -(eg `"exists_time": "1h"` or `"size": "1kb"`) and for computers
  -(eg `"exists_time_in_millis": 3600000` or `"size_in_bytes": 1024`).
  +(e.g. `"exists_time": "1h"` or `"size": "1kb"`) and for computers
  +(e.g. `"exists_time_in_millis": 3600000` or `"size_in_bytes": 1024`).
   The human readable values can be turned off by adding `?human=false`
   to the query string. This makes sense when the stats results are
   being consumed by a monitoring tool, rather than intended for human
  
positive.code: === Distance Units
  
  Wherever distances need to be specified, such as the `distance` parameter in
  the <<query-dsl-geo-distance-query>>), the default unit if none is specified is
  the meter. Distances can be specified in other units, such as `"1km"` or
  `"2mi"` (2 miles).
  
  The full list of units is listed below:
  
negative.code: `static_name`:: is the static text part of the name
  `date_math_expr`:: is a dynamic date math expression that computes the date dynamically
  `date_format`:: is the optional format in which the computed date should be rendered. Defaults to `YYYY.MM.dd`.
  `time_zone`:: is the optional time zone. Defaults to `utc`.
  
  Date math expressions are resolved locale-independent. Consequently, it is not possible to use any other
  calendars than the Gregorian calendar.
  