Enabling 4.2 Support outputs invalid html

[Patabugen]

If I enable WP 4.2 support in the comments the plugin outputs a <div class="g-recaptcha"> inside a <p class="form-submit"> - which isn't valid code and breaks styles when the browser pops it out.

I'm working around it by replacing the comments_form defaults and making .form-submit a div instead of a p

/* The Recaptcha plugin injects a div into the form-submit <p> - but a div cannot be inside a P
 so it all falls apart style wise. Make the form-submit into a div instead of a p */
function wpdocs_comment_form_defaults( $defaults ) {
  $defaults['submit_field'] = '<div class="form-submit">%1$s %2$s</div>';
  return $defaults;
}
add_filter( 'comment_form_defaults', 'wpdocs_comment_form_defaults' );

it's be better if we could output the recaptcha as it's own field - rather than injecting it inside the wrapper for the submit field.