sed '/<unknown>$$/d' | fmt -s > $(changelog_dir)/cl-t; \
if test -n "$(prev_change_log)" && test -f "$(prev_change_log)"; \
then \
sed '/<unknown>$$/d' | fmt -s > $(changelog_dir)/cl-t; \
if test -n "$(prev_change_log)" && test -f "$(prev_change_log)"; \
then \