anchor.diff:  * `edit 2 n/Betsy Crower t/` +
   Edits the name of the 2nd person to be `Betsy Crower` and clears all existing tags.
   
  -=== Finding all persons containing any keyword in their name: `find`
  +=== Locating persons by name: `find`
   
   Finds persons whose names contain any of the given keywords. +
   Format: `find KEYWORD [MORE_KEYWORDS]`
  
positive.code: Format: `add n/NAME p/PHONE_NUMBER e/EMAIL a/ADDRESS [t/TAG]...`
  
  [TIP]
  Persons can have any number of tags (including 0)
  
  Examples:
  
  
negative.code: :tip-caption: :bulb:
  :note-caption: :information_source:
  endif::[]
  :repoURL: https://github.com/se-edu/addressbook-level4
  
  By: `Team SE-EDU`      Since: `Jun 2016`      Licence: `MIT`
  
  