anchor.diff:  sufficient to catch 80% of all human misspellings. It can be specified as:
   
       quikc~1
  +
  +[[avoid-widlcards-fuzzy-searches]]
  +[WARNING]
  +.Avoid mixing fuzziness with wildcards
  +====
  +Mixing <<fuzziness,fuzzy>> and <<query-string-wildcard,wildcard>> operators is
  +_not_ supported. When mixed, one of the operators is not applied. For example,
  +you can search for `app~1` (fuzzy) or `app*` (wildcard), but searches for
  +`app*~1` do not apply the fuzzy operator (`~1`).
  +====
   
   ====== Proximity searches
   
  
positive.code: 
      _exists_:title
  
  ====== Wildcards
  
  Wildcard searches can be run on individual terms, using `?` to replace
  
negative.code: Use with caution!
  =======
  
  [[query-string-fuzziness]]
  ====== Fuzziness
  
  We can search for terms that are
  