add doc

src/test/java/de/tudresden/inf/st/mg/ParserTest.java

@@ -67,13 +67,13 @@ public class ParserTest {
     var result = parser.parse();
 
     assertThat(result).isNotNull().isInstanceOf(Tidy.class);
-    try {
-      Thread.sleep(100*1000);
-    } catch (InterruptedException e) {
-      e.printStackTrace();
-    }
   }
 
+
+  /**
+   * Runs the parser on the actual robot. For this to work, a robot controller must be connected to an MQTT server running
+   * on localhost:1883
+   */
   @Test
   @Disabled
   void runRealTidyParser() throws MotionGrammarParser.ParseException {