anchor.diff:      "store.size": "650b"
     }
   ]
  ---------------------------------------------------
  +----
   // NOTCONSOLE
   
   Currently supported formats (for the `?format=` parameter):
  
positive.code: verbose output. For example:
  
  [source,console]
  --------------------------------------------------
  GET /_cat/master?v=true
  --------------------------------------------------
  
  Might respond with:
  
  [source,txt]
  --------------------------------------------------
  id                     host      ip        node
  u_n93zwxThWHi1PDBJAGAg 127.0.0.1 127.0.0.1 u_n93zw
  --------------------------------------------------
  // TESTRESPONSE[s/u_n93zw(xThWHi1PDBJAGAg)?/.+/ non_json]
  
  [discrete]
  
negative.code: output its available columns. For example:
  
  [source,console]
  ----
  GET _cat/master?help
  ----
  
  Might respond with:
  
  [source,txt]
  ----
  id   |   | node id
  host | h | host name
  ip   |   | ip address
  node | n | node name
  ----
  // TESTRESPONSE[s/[|]/[|]/ non_json]
  
  NOTE: `help` is not supported if any optional url parameter is used.
  