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use 5.010;
use strict;
...
    say shift

}

use 5.010;
use strict;
...
    my $s = join ' ', map { sprintf("$_='%s'", ($d->{$_} // '')) } sor
+t keys %$d;
    say $s;
}

use 5.010;
use strict;
...
    my ($fmt, @params) = @_;
    printf "$fmt\n", map { $_ // '' } @params;
}