diff --git a/wp-includes/class-wp-customize-manager.php b/wp-includes/class-wp-customize-manager.php
index 85e225138e..e81c92cc51 100644
--- a/wp-includes/class-wp-customize-manager.php
+++ b/wp-includes/class-wp-customize-manager.php
@@ -4614,7 +4614,7 @@ final class WP_Customize_Manager {
 		$section_description = '<p>';
 		$section_description .= __( 'Add your own CSS code here to customize the appearance and layout of your site.' );
 		$section_description .= sprintf(
-			' <a href="%1$s" class="external-link" target="_blank">%2$s<span class="screen-reader-text">%3$s</span></a>',
+			' <a href="%1$s" class="external-link" target="_blank">%2$s<span class="screen-reader-text"> %3$s</span></a>',
 			esc_url( __( 'https://codex.wordpress.org/CSS' ) ),
 			__( 'Learn more about CSS' ),
 			/* translators: accessibility text */
@@ -4632,12 +4632,11 @@ final class WP_Customize_Manager {
 		if ( 'false' !== wp_get_current_user()->syntax_highlighting ) {
 			$section_description .= '<p>';
 			$section_description .= sprintf(
-				/* translators: placeholder is link to user profile */
-				__( 'The edit field automatically highlights code syntax. You can disable this in your %s to work in plain text mode.' ),
-				sprintf(
-					' <a href="%1$s" class="external-link" target="_blank">%2$s<span class="screen-reader-text">%3$s</span></a>',
-					esc_url( get_edit_profile_url() ),
-					__( 'user profile' ),
+				/* translators: 1: link to user profile, 2: additional link attributes, 3: accessibility text */
+				__( 'The edit field automatically highlights code syntax. You can disable this in your <a href="%1$s" %2$s>user profile%3$s</a> to work in plain text mode.' ),
+				esc_url( get_edit_profile_url() ),
+				'class="external-link" target="_blank"',
+				sprintf( '<span class="screen-reader-text"> %s</span>',
 					/* translators: accessibility text */
 					__( '(opens in a new window)' )
 				)
diff --git a/wp-includes/version.php b/wp-includes/version.php
index abb132a777..cc3562a41b 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.9-alpha-41638';
+$wp_version = '4.9-alpha-41639';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.
diff --git a/wp-includes/widgets/class-wp-widget-custom-html.php b/wp-includes/widgets/class-wp-widget-custom-html.php
index ad6ce956db..8c4e838e05 100644
--- a/wp-includes/widgets/class-wp-widget-custom-html.php
+++ b/wp-includes/widgets/class-wp-widget-custom-html.php
@@ -257,12 +257,11 @@ class WP_Widget_Custom_HTML extends WP_Widget {
 		if ( 'false' !== wp_get_current_user()->syntax_highlighting ) {
 			$content .= '<p>';
 			$content .= sprintf(
-				/* translators: placeholder is link to user profile */
-				__( 'The edit field automatically highlights code syntax. You can disable this in your %s to work in plain text mode.' ),
-				sprintf(
-					' <a href="%1$s" class="external-link" target="_blank">%2$s<span class="screen-reader-text">%3$s</span></a>',
-					esc_url( get_edit_profile_url() ),
-					__( 'user profile' ),
+				/* translators: 1: link to user profile, 2: additional link attributes, 3: accessibility text */
+				__( 'The edit field automatically highlights code syntax. You can disable this in your <a href="%1$s" %2$s>user profile%3$s</a> to work in plain text mode.' ),
+				esc_url( get_edit_profile_url() ),
+				'class="external-link" target="_blank"',
+				sprintf( '<span class="screen-reader-text"> %s</span>',
 					/* translators: accessibility text */
 					__( '(opens in a new window)' )
 				)