diff -r c7c34916027a -r 177826044cd9 wp/wp-admin/credits.php
--- a/wp/wp-admin/credits.php	Mon Oct 14 18:06:33 2019 +0200
+++ b/wp/wp-admin/credits.php	Mon Oct 14 18:28:13 2019 +0200
@@ -18,18 +18,36 @@
 ?>
 <div class="wrap about-wrap full-width-layout">
 
-<h1><?php printf( __( 'Welcome to WordPress %s' ), $display_version ); ?></h1>
-
-<p class="about-text"><?php printf( __( 'Thank you for updating to the latest version! WordPress %s will smooth your design workflow and keep you safe from coding errors.' ), $display_version ); ?></p>
+<h1>
+	<?php
+	/* translators: %s: The current WordPress version number */
+	printf( __( 'Welcome to WordPress&nbsp;%s' ), $display_version );
+	?>
+</h1>
 
-<div class="wp-badge"><?php printf( __( 'Version %s' ), $display_version ); ?></div>
+<p class="about-text">
+	<?php
+	printf(
+		/* translators: %s: The current WordPress version number */
+		__( 'Congratulations on updating to WordPress %s! This update makes it easier than ever to fix your site if something goes wrong.' ),
+		$display_version
+	);
+	?>
+</p>
 
-<h2 class="nav-tab-wrapper wp-clearfix">
+<div class="wp-badge">
+	<?php
+	/* translators: %s: The current WordPress version number */
+	printf( __( 'Version %s' ), $display_version );
+	?>
+</div>
+
+<nav class="nav-tab-wrapper wp-clearfix" aria-label="<?php esc_attr_e( 'Secondary menu' ); ?>">
 	<a href="about.php" class="nav-tab"><?php _e( 'What&#8217;s New' ); ?></a>
-	<a href="credits.php" class="nav-tab nav-tab-active"><?php _e( 'Credits' ); ?></a>
+	<a href="credits.php" class="nav-tab nav-tab-active" aria-current="page"><?php _e( 'Credits' ); ?></a>
 	<a href="freedoms.php" class="nav-tab"><?php _e( 'Freedoms' ); ?></a>
 	<a href="freedoms.php?privacy-notice" class="nav-tab"><?php _e( 'Privacy' ); ?></a>
-</h2>
+</nav>
 
 <div class="about-wrap-content">
 <?php
@@ -38,8 +56,9 @@
 
 if ( ! $credits ) {
 	echo '<p class="about-description">';
-	/* translators: 1: https://wordpress.org/about/, 2: https://make.wordpress.org/ */
-	printf( __( 'WordPress is created by a <a href="%1$s">worldwide team</a> of passionate individuals. <a href="%2$s">Get involved in WordPress</a>.' ),
+	printf(
+		/* translators: 1: https://wordpress.org/about/, 2: https://make.wordpress.org/ */
+		__( 'WordPress is created by a <a href="%1$s">worldwide team</a> of passionate individuals. <a href="%2$s">Get involved in WordPress</a>.' ),
 		'https://wordpress.org/about/',
 		__( 'https://make.wordpress.org/' )
 	);
@@ -64,23 +83,26 @@
 			// Considered a special slug in the API response. (Also, will never be returned for en_US.)
 			$title = _x( 'Translators', 'Translate this to be the equivalent of English Translators in your language for the credits page Translators section' );
 		} elseif ( isset( $group_data['placeholders'] ) ) {
+			// phpcs:ignore WordPress.WP.I18n.LowLevelTranslationFunction,WordPress.WP.I18n.NonSingularStringLiteralText
 			$title = vsprintf( translate( $group_data['name'] ), $group_data['placeholders'] );
 		} else {
+			// phpcs:ignore WordPress.WP.I18n.LowLevelTranslationFunction,WordPress.WP.I18n.NonSingularStringLiteralText
 			$title = translate( $group_data['name'] );
 		}
 
-		echo '<h3 class="wp-people-group">' . esc_html( $title ) . "</h3>\n";
+		echo '<h2 class="wp-people-group">' . esc_html( $title ) . "</h2>\n";
 	}
 
-	if ( ! empty( $group_data['shuffle'] ) )
+	if ( ! empty( $group_data['shuffle'] ) ) {
 		shuffle( $group_data['data'] ); // We were going to sort by ability to pronounce "hierarchical," but that wouldn't be fair to Matt.
+	}
 
 	switch ( $group_data['type'] ) {
-		case 'list' :
+		case 'list':
 			array_walk( $group_data['data'], '_wp_credits_add_profile_link', $credits['data']['profiles'] );
 			echo '<p class="wp-credits-list">' . wp_sprintf( '%l.', $group_data['data'] ) . "</p>\n\n";
 			break;
-		case 'libraries' :
+		case 'libraries':
 			array_walk( $group_data['data'], '_wp_credits_build_object_link' );
 			echo '<p class="wp-credits-list">' . wp_sprintf( '%l.', $group_data['data'] ) . "</p>\n\n";
 			break;
@@ -91,18 +113,20 @@
 			foreach ( $group_data['data'] as $person_data ) {
 				echo '<li class="wp-person" id="wp-person-' . esc_attr( $person_data[2] ) . '">' . "\n\t";
 				echo '<a href="' . esc_url( sprintf( $credits['data']['profiles'], $person_data[2] ) ) . '" class="web">';
-				$size = 'compact' == $group_data['type'] ? 30 : 60;
-				$data = get_avatar_data( $person_data[1] . '@md5.gravatar.com', array( 'size' => $size ) );
-				$size *= 2;
+				$size   = 'compact' == $group_data['type'] ? 30 : 60;
+				$data   = get_avatar_data( $person_data[1] . '@md5.gravatar.com', array( 'size' => $size ) );
+				$size  *= 2;
 				$data2x = get_avatar_data( $person_data[1] . '@md5.gravatar.com', array( 'size' => $size ) );
 				echo '<img src="' . esc_url( $data['url'] ) . '" srcset="' . esc_url( $data2x['url'] ) . ' 2x" class="gravatar" alt="" />' . "\n";
 				echo esc_html( $person_data[0] ) . "</a>\n\t";
-				if ( ! $compact )
+				if ( ! $compact ) {
+					// phpcs:ignore WordPress.WP.I18n.LowLevelTranslationFunction,WordPress.WP.I18n.NonSingularStringLiteralText
 					echo '<span class="title">' . translate( $person_data[3] ) . "</span>\n";
+				}
 				echo "</li>\n";
 			}
 			echo "</ul>\n";
-		break;
+			break;
 	}
 }
 
@@ -117,6 +141,7 @@
 
 // These are strings returned by the API that we want to be translatable
 __( 'Project Leaders' );
+/* translators: %s: The current WordPress version number */
 __( 'Core Contributors to WordPress %s' );
 __( 'Noteworthy Contributors' );
 __( 'Cofounder, Project Lead' );