A new feature A

TS-0019-Abstract_Test_Suite_&_implementation_eXtra_Information_for_Test.md

@@ -219,6 +219,8 @@ APTs used by the oneM2M test suite are described in figure 5.1-1. The test syste
 
 As figure 5.1-1 illustrates, the corresponding ATS needs to use lower layers to establish a proper connection to the system under test (SUT) over a physical link (Lower layers link). Four different lower layers have been specified corresponding to the binding protocols considered in oneM2M: HTTP, CoAP, WebSocket and MQTT.
 
+This is a demo for markdown spec.
+
 
 ## 5.2 Test Configuration