diff --git a/wp-includes/pluggable.php b/wp-includes/pluggable.php
index 835a0d6df3..926f3e41b1 100644
--- a/wp-includes/pluggable.php
+++ b/wp-includes/pluggable.php
@@ -454,7 +454,7 @@ if ( ! function_exists( 'wp_mail' ) ) :
 		if ( ! empty( $headers ) ) {
 			foreach ( (array) $headers as $name => $content ) {
 				// Only add custom headers not added automatically by PHPMailer.
-				if ( ! in_array( $name, array( 'MIME-Version', 'X-Mailer') ) ) {
+				if ( ! in_array( $name, array( 'MIME-Version', 'X-Mailer' ) ) ) {
 					$phpmailer->addCustomHeader( sprintf( '%1$s: %2$s', $name, $content ) );
 				}
 			}
diff --git a/wp-includes/version.php b/wp-includes/version.php
index a000f98723..b402db20c9 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.3-alpha-46115';
+$wp_version = '5.3-alpha-46116';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.