anchor.diff:  
   [discrete]
   [[eql-syntax-lookup-operators]]
  -=== Lookup operators
  +==== Lookup operators
   
   [source,eql]
   ----
  
positive.code: 
  [discrete]
  [[eql-syntax-match-any-event-category]]
  === Match any event category
  
  To match events of any category, use the `any` keyword. You can also use the
  `any` keyword to search for documents without a event category field.
  
negative.code: 
  [discrete]
  [[eql-syntax-wildcards]]
  ==== Wildcards
  
  For string comparisons using the `:` operator or `like` keyword, you can use the
  `*` and `?` wildcards to match specific patterns. The `*` wildcard matches zero
  