grep timezone $(srcdir)/*.texi && fail=1; \
grep -w IO $(srcdir)/*.texi && fail=1; \
grep non-zero $(srcdir)/*.texi && fail=1; \
+ grep '@url{' $(srcdir)/*.texi && fail=1; \
grep -w NUL $(srcdir)/*.texi && fail=1; \
grep '\$$@"' $(srcdir)/*.texi && fail=1; \
+ grep -n '[^[:punct:]]@footnote' $(srcdir)/*.texi && fail=1; \
grep -n filename $(srcdir)/*.texi|grep -vE 'setfilename|{filename}' \
&& fail=1; \
$(PERL) -e 1 2> /dev/null && { $(PERL) -ne \