anchor.diff:  // TEST[setup:twitter]
   
   [[matched-fields]]
  -===== Combining matches on multiple fields
  +[float]
  +=== Combine matches on multiple fields
   
   WARNING: This is only supported by the `fvh` highlighter
   
  
positive.code: `sentence`, or `word`. Only valid for the `unified` and `fvh` highlighters.
  Defaults to `sentence` for the `unified` highlighter. Defaults to `chars` for
  the `fvh` highlighter.
  +
  * `chars` Use the characters specified by `boundary_chars` as highlighting
  boundaries.  The `boundary_max_scan` setting controls how far to scan for
  boundary characters. Only valid for the `fvh` highlighter.
  * `sentence` Break highlighted fragments at the next sentence boundary, as
  determined by Java's 
  https://docs.oracle.com/javase/8/docs/api/java/text/BreakIterator.html[BreakIterator].
  You can specify the locale to use with `boundary_scanner_locale`.
  
negative.code: [[highlighting-examples]]
  ==== Highlighting Examples
  
  * <<override-global-settings, Override global settings>>
  * <<specify-highlight-query, Specify a highlight query>>
  * <<set-highlighter-type, Set highlighter type>>
  * <<configure-tags, Configure highlighting tags>>
  * <<highlight-source, Highlight source>>
  * <<highlight-all, Highlight all fields>>
  * <<matched-fields, Combine matches on multiple fields>>
  * <<explicit-field-order, Explicitly order highlighted fields>>
  * <<control-highlighted-frags, Control highlighted fragments>>
  * <<highlight-postings-list, Highlight using the postings list>>
  * <<specify-fragmenter, Specify a fragmenter for the plain highlighter>>
  
  [[override-global-settings]]
  [float]
  === Override global settings
  
  You can specify highlighter settings globally and selectively override them for
  individual fields.
  
  [source,js]
  --------------------------------------------------
  GET /_search
  {
      "query" : {
          "match": { "user": "kimchy" }
      },
      "highlight" : {
          "number_of_fragments" : 3,
          "fragment_size" : 150,
          "fields" : {
              "_all" : { "pre_tags" : ["<em>"], "post_tags" : ["</em>"] },
              "blog.title" : { "number_of_fragments" : 0 },
              "blog.author" : { "number_of_fragments" : 0 },
              "blog.comment" : { "number_of_fragments" : 5, "order" : "score" }
          }
      }
  }
  --------------------------------------------------
  // CONSOLE
  // TEST[setup:twitter]
  
  [float]
  [[specify-highlight-query]]
  === Specify a highlight query
  
  You can specify a `highlight_query` to take additional information into account
  when highlighting. For example, the following query includes both the search
  query and rescore query in the `highlight_query`. Without the `highlight_query`,
  highlighting would only take the search query into account.
  
  [source,js]
  --------------------------------------------------
  