lib/date/delta.rb: merged from date4. [experimental]
* lib/date/delta/parser.*: ditto. * lib/date.rb: followed the above changes.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@24567 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
lib/date/delta.rb: merged from date4. [experimental]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@24567 b2dd03c8-39d4-4d8f-98ff-823fe69b080e