#24: login_messages

login_messages.php

<?php
/**
 * AP style-ize 'e-mail' in login messages
 * 
 * @param string $messages The login message(s).
 *
 * @return string The filtered login message(s).
 */
function wpdocs_login_messages( $messages ) {
	$messages = str_replace( 'e-mail', 'email', $messages );
	return $messages;
}
add_filter( 'login_messages', 'wpdocs_login_messages' );