That seems wrong to me since brief seems not to do that. After the example it says:
But that’s the opposite of what is shown by the test me command. If you just run the example, the Wilkie Memorial Research Wing is NOT given a description the second time through.
Reading the rest of the example, is ‘brief’ being confused with ‘verbose’?
Before 6L02 “brief” mode was the default, and this example showed how to switch to “verbose”. Now “verbose” is the default, so the example has been changed to show how to switch to “brief”. Evidently some parts of the manual weren’t completely updated; you should submit this as a bug on Mantis.