assertions 0.9.0

This package adds some additional assertions to Test::Unit::Assertions, including: * Assertions for all of the comparison operators (assert_greater_than, assert_less_than_or_equal_to, etc.). Shorter aliases also are provided for these (assert_gt, assert_le, etc.). * An assertion that tests whether a given block raises a specified exception with a specified message (assert_raise_message). This allows full testing of error messages. * An assertion that tests whether a given block contains an assertion that fails, which can be used to test new assertions.