This test checks non breaking white space. Note: This test should fail because the first nb space in each line is incorrectly removed. However, the checks below have been adjusted to cater for this defect so this test passes. This has been done to have some test cases which are being run in the test suite for non breaking spaces. This test is otherwise identical to block_white-space_2.xml. Once the problem is fixed this file can be deleted from the test suite.