add a test case of background url containing whitespaces
add a test case of background url containing whitespaces

UAK-35/wro4j,wro4j/wro4j,dacofr/wro4j,dacofr/wro4j,wro4j/wro4j,dacofr/wro4j,UAK-35/wro4j,UAK-35/wro4j,dacofr/wro4j,wro4j/wro4j,UAK-35/wro4j