Function results displaying before HTML tags

Here is the live site, currently:
http://newsomemediasolutions.com/demos/millam/?page_id=5

Here is the source code:
add_action( ‘genesis_before_entry’, ‘post_information’ );
function post_information() {
echo the_category() . ” // ” . the_date();
}

This is in the functions.php file of a Genesis child theme. The desire is for it to display like this:
Category // Date

I would then be able to position it and fix the CSS. I know it’s something simple I am overlooking.

Thanks in advance for the help, everyone.