add print.key property for example
@@ -78,7 +78,7 @@ import org.apache.kafka.streams.kstream.{KStream, KStreamBuilder}
*
* {{{
* $ bin/kafka-console-consumer --new-consumer --bootstrap-server localhost:9092 --topic UppercasedTextLinesTopic --from-beginning
- * $ bin/kafka-console-consumer --new-consumer --bootstrap-server localhost:9092 --topic OriginalAndUppercasedTopic --from-beginning
+ * $ bin/kafka-console-consumer --new-consumer --bootstrap-server localhost:9092 --topic OriginalAndUppercasedTopic --from-beginning --property print.key=true
* }}}
*
* You should see output data similar to:
