ruby.git/lib/date/delta, branch ruby_1_9_2

* complex.c, rational.c, lib/cmath.rb, lib/date.rb lib/date/delta*:

2010-04-26T11:14:40+00:00

	  reverted r27484-27486.  now official spec.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@27503 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* lib/date.rb, lib/date/delta*: reverted experimental r24567 and

2010-04-25T06:37:18+00:00

	  r25393.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@27484 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* lib/date/delta.rb: merged from date4. [experimental]

2009-08-16T23:35:28+00:00

	* 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