Update implicit_using_namespaces.hpp

Author: gammasoft71

src/xtd.core/include/xtd/implicit_using_namespaces.hpp

@@ -6,7 +6,9 @@
 
 /// @cond
 #if defined(__XTD_ENABLE_IMPLICIT_USING_NAMESPACES__)
-#define __using_namespace__(name_space) namespace name_space {} using namespace name_space
+#define __using_namespace__(name_space) \
+  namespace name_space {} \
+  using namespace name_space
 
 #if __XTD_CURRENT_TARGET_ID__ == __CMAKE_TARGET_ID_TEST_APPLICATION__ || __XTD_CURRENT_TARGET_ID__ == __XTD_TARGET_ID_CONSOLE_APPLICATION__ || __XTD_CURRENT_TARGET_ID__ == __XTD_TARGET_ID_GUI_APPLICATION__ || __XTD_CURRENT_TARGET_ID__ == __XTD_TARGET_ID_UNKNOWN__
 __using_namespace__(xtd);