Filter munges out during doc generation

This allows us to apply content-mutating munges to generated files and nothave
the verifier flag them as needing regeneration later.

hack/verify-gendocs.sh

@@ -60,10 +60,10 @@ if [[ $ret -eq 2 ]]; then
 fi
 
 kube::util::gen-doc "${genman}" "${TMP_DOCROOT}/man/man1/"
-kube::util::gen-doc "${gendocs}" "${TMP_DOCROOT}"
+kube::util::gen-doc "${gendocs}" "${TMP_DOCROOT}" '###### Auto generated by spf13/cobra'
 echo "diffing ${DOCROOT} against freshly generated docs"
 ret=0
-diff -Naupr -I 'Auto generated by' "${DOCROOT}" "${TMP_DOCROOT}" || ret=$?
+diff -Naupr "${DOCROOT}" "${TMP_DOCROOT}" || ret=$?
 rm -rf "${_tmp}"
 needsanalytics=($(kube::util::gen-analytics "${KUBE_ROOT}" 1))
 if [[ ${#needsanalytics[@]} -ne 0 ]]; then