It finds subdirectories of usr/local in the package build directory, and
removes them, replacing them with maintainer script snippets (unless B<-n>
is used) to create the directories at install time, and remove them when
-the package is removed, in a manner compliant with Debian policy. See
+the package is removed, in a manner compliant with Debian policy. These
+snippets are inserted into the maintainer scripts by dh_installdeb. See
L<dh_installdeb(1)> for an explanation of Debhelper maintainer script
snippets.