Fixed class and include diagrams tests in Windows

tests/test_cases.cc

@@ -15,6 +15,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 #include "test_cases.h"
 #include "common/generators/plantuml/generator.h"
 

tests/test_model.cc

@@ -21,6 +21,7 @@
 
 #include "common/model/namespace.h"
 
+
 TEST_CASE("Test namespace_", "[unit-test]")
 {
     using clanguml::common::model::namespace_;