Docs: Improve description of the `$email` parameter in `email_exists()`.

Follow-up to [49148].

Props garrett-eclipse.
See #51379.
Built from https://develop.svn.wordpress.org/trunk@49153


git-svn-id: http://core.svn.wordpress.org/trunk@48915 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/user.php

@@ -1604,7 +1604,7 @@ function username_exists( $username ) {
 	 *
 	 * @param int|false $user_id  The user ID associated with the username,
 	 *                            or false if the username does not exist.
-	 * @param string    $username Username to check.
+	 * @param string    $username The username to check for existence.
 	 */
 	return apply_filters( 'username_exists', $user_id, $username );
 }
@@ -1618,7 +1618,7 @@ function username_exists( $username ) {
  *
  * @since 2.1.0
  *
- * @param string $email Email.
+ * @param string $email The email to check for existence.
  * @return int|false The user ID on success, false on failure.
  */
 function email_exists( $email ) {
@@ -1636,7 +1636,7 @@ function email_exists( $email ) {
 	 *
 	 * @param int|false $user_id The user ID associated with the email,
 	 *                           or false if the email does not exist.
-	 * @param string    $email   Email.
+	 * @param string    $email   The email to check for existence.
 	 */
 	return apply_filters( 'email_exists', $user_id, $email );
 }

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.6-alpha-49152';
+$wp_version = '5.6-alpha-49153';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.