you ask it to (similar to cp -a). If it is asked to install a
directory, it will install the complete contents of the directory.
-Note that this command is not idempotent. "dh_clean B<-k>" should be called
+Note that this command is not idempotent. L<dh_prep(1)> should be called
between invocations of this command. Otherwise, it may cause multiple
instances of the same text to be added to maintainer scripts.