Error in Example 4.20. Configuring attached Goal Execution during the package Lifecycle Phase

The example should read

<project>
[...]
<build>
<plugins>
<plugin>
<artifactid>maven-assembly-plugin</artifactid>
<configuration>
<descriptorrefs>
<descriptorref>jar-with-dependencies</descriptorref>
</descriptorrefs>
</configuration>
<executions>
<execution>
<id>simple-command</id>
<phase>package</phase>
<goals>
<goal>attached</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
[...]
</project>