The example is not right in parameter, and also
one command is same as first one, it should be typo
before, we should use 'rw' as example for that.
Signed-off-by: Kai Qiang Wu(Kennan) <wkqwu@cn.ibm.com>
Upstream-commit: 62b525f75dbdb78f8ae7ee7f6b2cac2d262dc4dd
Component: engine