anchor.diff:  
   `field`::
       The field to fetch the candidate suggestions from. This is
  -    an required option that either needs to be set globally or per
  +    a required option that either needs to be set globally or per
       suggestion.
   
   `analyzer`::
  
positive.code: 
  `max_inspections`::
      A factor that is used to multiply with the
      `shards_size` in order to inspect more candidate spell corrections on
      the shard level. Can improve accuracy at the cost of performance.
      Defaults to 5.
  
  
negative.code: 
  [horizontal]
  `lowercase_terms`::
      Lowercases the suggest text terms after text analysis.
  
  `max_edits`::
      The maximum edit distance candidate suggestions can
      have in order to be considered as a suggestion. Can only be a value
      between 1 and 2. Any other value results in a bad request error being
      thrown. Defaults to 2.
  
  `prefix_length`::
      The number of minimal prefix characters that must
      match in order be a candidate for suggestions. Defaults to 1. Increasing
      this number improves spellcheck performance. Usually misspellings don't
      occur in the beginning of terms. (Old name "prefix_len" is deprecated)
  
  