theshoeshiner opened a new pull request, #1062:
URL: https://github.com/apache/commons-lang/pull/1062

   Relatively simple low-impact implementation of optional tokens within 
DurationFormatUtils. Useful when you need more human readable duration strings.
   
   Brackets [] are used to denote optional tokens. Optional tokens are only 
printed if non-zero. Optional literals are only printed if the preceding 
non-literal was non-zero.
   
   e.g. A single format:  `[d'd'H'h'm'm']s's'`
   Can produce outputs like:
   ```
   1d 2h 3m 14s
   2h 3m 14s
   3m 14s
   14s
   0s
   ```
   
   2 unit tests added.


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