anchor.diff:  Retrieves the cluster's <<alias,index aliases>>, including filter and routing
   information. The API does not return data stream aliases.
   
  -
   [[cat-alias-api-request]]
   ==== {api-request-title}
   
  -`GET /_cat/aliases/<alias>`
  +`GET _cat/aliases/<alias>`
   
  -`GET /_cat/aliases`
  +`GET _cat/aliases`
   
   [[cat-alias-api-prereqs]]
   ==== {api-prereq-title}
  
positive.code: ==== {api-path-parms-title}
  
  `<alias>`::
  (Optional, string)
  include::{es-repo-dir}/rest-api/common-parms.asciidoc[tag=index-alias]
  
  
  [[cat-alias-api-query-params]]
  ==== {api-query-parms-title}
  
negative.code: 
  include::{es-repo-dir}/rest-api/common-parms.asciidoc[tag=expand-wildcards]
  
  [[cat-alias-api-example]]
  ==== {api-examples-title}
  
  ////
  Hidden setup for example:
  [source,console,id=cat-aliases-example]
  ----
  PUT test1
  {
    "aliases": {
  