sub not_in_file_ok {
    my ($filename,%regex) = @_;
    open( my $fh,'<',$filename ) or die "couldn't open $filename for reading: $!";
    my %violated;
    while (my $line = <$fh>) {
        while (my ($desc,$regex) = each %regex) {
            if ($line =~ $regex) {
                push @{$violated{$desc}||=[]},$.;
            }
        }
    }
    if (%violated) {
    fail("$filename contains boilerplate text");
    diag "$_ appears on lines @{$violated{$_}}" for keys %violated;
    } else {
    pass("$filename contains no boilerplate text");
    }
}