anchor.diff:  
   ==== Datetime Modification
   
  -Use either a long or a ZonedDateTime to do datetime modification such as adding
  -several seconds to a datetime or subtracting several days from a datetime. Use
  -standard <<painless-operators-numeric, numeric operators>> to modify a long
  -representation of a datetime. Use ZonedDateTime
  -<<painless-api-reference-shared-ZonedDateTime, methods>> to modify a
  -ZonedDateTime representation of a datetime. Note most modification methods for
  -a ZonedDateTime return a new instance for assignment or immediate use.
  +Use either a numeric datetime or a complex datetime to do modification such as
  +adding several seconds to a datetime or subtracting several days from a
  +datetime. Use standard <<painless-operators-numeric, numeric operators>> to
  +modify a numeric datetime. Use
  +<<painless-api-reference-shared-ZonedDateTime, methods>> (or fields) to modify
  +a complex datetime. Note many complex datetimes are immutable so upon
  +modification a new complex datetime is created that requires
  +<<variable-assignment, assignment>> or immediate use.
   
   ===== Datetime Modification Examples
   
  -* Subtract three seconds from milliseconds
  +* Subtract three seconds from a numeric datetime in milliseconds
   +
   [source,Painless]
   ----
  
positive.code: ZonedDateTime updatedZdt = zdt.minusMinutes(125);
  ----
  +
  * Set the year on a datetime
  +
  [source,Painless]
  ----
  
negative.code: ZonedDateTime updatedZdt = zdt.plusDays(3);
  ----
  +
  * Subtract 125 minutes from a complex datetime
  +
  [source,Painless]
  ----
  