fixup! demoDyn update - merge who&introduce

psGrammar/demos/demoDynamic.jsgf

@@ -19,7 +19,7 @@ public <command> = [<robot>] ( <introduce> | <save> | <wave> | <goTo> | <followM
 <describe> = (tell me what you see);
 <difference> = (spot the difference);
 
-#unused
+// unused
 <handover> = handover;
 <ordering> = (start taking orders) | (take my order);
 <learn> = (learn a person);