fuel/core — pull request #1498 by fbnfgc (2013-08-05 10:01:08+00:00)
Title: Backup date default timezone before using date_default_timezone_set in Date unit test.

Forcing date default timezone in unit test is not a good idea because it is breaking environment configuration in other unit tests.
This commit reverts original date default timezone before exiting the function test_format in Fuel\Core\Test_Date.