Fix README

sdk/test/trace/w3c_tracecontext_test/README.md

@@ -1,18 +1,18 @@
 # Test service endpoint for W3C validation
 
-This example program is intended to be used as a test service for the [W3C Distributed Tracing Validation Service](https://github.com/w3c/trace-context/tree/master/test).
+This test application is intended to be used as a test service for the [W3C Distributed Tracing Validation Service](https://github.com/w3c/trace-context/tree/master/test).
 It is implemented according to [this instructions](https://github.com/w3c/trace-context/tree/master/test#implement-test-service).
 
 ## Usage
 
 1. Build and start the test service endpoint:
    ```sh
-   $ ./example_w3c_tracecontext_test
+   $ ./w3c_tracecontext_test
    Listening to http://localhost:30000/test
    ```
    A custom port number for the test service to listen to can be specified:
    ```sh
-   $ ./example_w3c_tracecontext_test 31339
+   $ ./w3c_tracecontext_test 31339
    Listening to http://localhost:31339/test
    ```
    The test service will print the full URI that the validation service can connect to.
@@ -26,7 +26,7 @@ It is implemented according to [this instructions](https://github.com/w3c/trace-
    run the validation service:
    ```sh
    $ docker build --tag w3c_driver .
-   $ docker run --network host w3c_driver  http://localhost:31339/test
+   $ docker run --network host w3c_driver http://localhost:31339/test
    ```
 3. The validation service will run the test suite and print detailed test results.
 4. Stop the test service by pressing enter.