t / t4018 / perl-skip-end-of-heredocon commit tests: factor portable signal check out of t0005 (9b67c99)
   1sub RIGHTwithheredocument {
   2        print <<"EOF"
   3decoy here-doc
   4EOF
   5        # some lines of context
   6        # to pad it out
   7        print "ChangeMe\n";
   8}