diff -r c7c34916027a -r 177826044cd9 wp/wp-includes/feed-atom.php
--- a/wp/wp-includes/feed-atom.php	Mon Oct 14 18:06:33 2019 +0200
+++ b/wp/wp-includes/feed-atom.php	Mon Oct 14 18:28:13 2019 +0200
@@ -5,38 +5,35 @@
  * @package WordPress
  */
 
-header('Content-Type: ' . feed_content_type('atom') . '; charset=' . get_option('blog_charset'), true);
+header( 'Content-Type: ' . feed_content_type( 'atom' ) . '; charset=' . get_option( 'blog_charset' ), true );
 $more = 1;
 
-echo '<?xml version="1.0" encoding="'.get_option('blog_charset').'"?'.'>';
+echo '<?xml version="1.0" encoding="' . get_option( 'blog_charset' ) . '"?' . '>';
 
 /** This action is documented in wp-includes/feed-rss2.php */
 do_action( 'rss_tag_pre', 'atom' );
 ?>
 <feed
-  xmlns="http://www.w3.org/2005/Atom"
-  xmlns:thr="http://purl.org/syndication/thread/1.0"
-  xml:lang="<?php bloginfo_rss( 'language' ); ?>"
-  xml:base="<?php bloginfo_rss('url') ?>/wp-atom.php"
-  <?php
-  /**
-   * Fires at end of the Atom feed root to add namespaces.
-   *
-   * @since 2.0.0
-   */
-  do_action( 'atom_ns' );
-  ?>
- >
+	xmlns="http://www.w3.org/2005/Atom"
+	xmlns:thr="http://purl.org/syndication/thread/1.0"
+	xml:lang="<?php bloginfo_rss( 'language' ); ?>"
+	xml:base="<?php bloginfo_rss( 'url' ); ?>/wp-atom.php"
+	<?php
+	/**
+	 * Fires at end of the Atom feed root to add namespaces.
+	 *
+	 * @since 2.0.0
+	 */
+	do_action( 'atom_ns' );
+	?>
+>
 	<title type="text"><?php wp_title_rss(); ?></title>
-	<subtitle type="text"><?php bloginfo_rss("description") ?></subtitle>
+	<subtitle type="text"><?php bloginfo_rss( 'description' ); ?></subtitle>
 
-	<updated><?php
-		$date = get_lastpostmodified( 'GMT' );
-		echo $date ? mysql2date( 'Y-m-d\TH:i:s\Z', $date, false ) : date( 'Y-m-d\TH:i:s\Z' );
-	?></updated>
+	<updated><?php echo get_feed_build_date( 'Y-m-d\TH:i:s\Z' ); ?></updated>
 
-	<link rel="alternate" type="<?php bloginfo_rss('html_type'); ?>" href="<?php bloginfo_rss('url') ?>" />
-	<id><?php bloginfo('atom_url'); ?></id>
+	<link rel="alternate" type="<?php bloginfo_rss( 'html_type' ); ?>" href="<?php bloginfo_rss( 'url' ); ?>" />
+	<id><?php bloginfo( 'atom_url' ); ?></id>
 	<link rel="self" type="application/atom+xml" href="<?php self_link(); ?>" />
 
 	<?php
@@ -47,14 +44,16 @@
 	 */
 	do_action( 'atom_head' );
 
-	while ( have_posts() ) : the_post();
-	?>
+	while ( have_posts() ) :
+		the_post();
+		?>
 	<entry>
 		<author>
-			<name><?php the_author() ?></name>
-			<?php $author_url = get_the_author_meta('url'); if ( !empty($author_url) ) : ?>
-			<uri><?php the_author_meta('url')?></uri>
-			<?php endif;
+			<name><?php the_author(); ?></name>
+			<?php $author_url = get_the_author_meta( 'url' ); if ( ! empty( $author_url ) ) : ?>
+			<uri><?php the_author_meta( 'url' ); ?></uri>
+				<?php
+			endif;
 
 			/**
 			 * Fires at the end of each Atom feed author entry.
@@ -62,32 +61,33 @@
 			 * @since 3.2.0
 			 */
 			do_action( 'atom_author' );
-		?>
+			?>
 		</author>
-		<title type="<?php html_type_rss(); ?>"><![CDATA[<?php the_title_rss() ?>]]></title>
-		<link rel="alternate" type="<?php bloginfo_rss('html_type'); ?>" href="<?php the_permalink_rss() ?>" />
-		<id><?php the_guid() ; ?></id>
-		<updated><?php echo get_post_modified_time('Y-m-d\TH:i:s\Z', true); ?></updated>
-		<published><?php echo get_post_time('Y-m-d\TH:i:s\Z', true); ?></published>
-		<?php the_category_rss('atom') ?>
+		<title type="<?php html_type_rss(); ?>"><![CDATA[<?php the_title_rss(); ?>]]></title>
+		<link rel="alternate" type="<?php bloginfo_rss( 'html_type' ); ?>" href="<?php the_permalink_rss(); ?>" />
+		<id><?php the_guid(); ?></id>
+		<updated><?php echo get_post_modified_time( 'Y-m-d\TH:i:s\Z', true ); ?></updated>
+		<published><?php echo get_post_time( 'Y-m-d\TH:i:s\Z', true ); ?></published>
+		<?php the_category_rss( 'atom' ); ?>
 		<summary type="<?php html_type_rss(); ?>"><![CDATA[<?php the_excerpt_rss(); ?>]]></summary>
-<?php if ( !get_option('rss_use_excerpt') ) : ?>
-		<content type="<?php html_type_rss(); ?>" xml:base="<?php the_permalink_rss() ?>"><![CDATA[<?php the_content_feed('atom') ?>]]></content>
-<?php endif; ?>
-	<?php atom_enclosure();
-	/**
-	 * Fires at the end of each Atom feed item.
-	 *
-	 * @since 2.0.0
-	 */
-	do_action( 'atom_entry' );
+		<?php if ( ! get_option( 'rss_use_excerpt' ) ) : ?>
+		<content type="<?php html_type_rss(); ?>" xml:base="<?php the_permalink_rss(); ?>"><![CDATA[<?php the_content_feed( 'atom' ); ?>]]></content>
+		<?php endif; ?>
+		<?php
+		atom_enclosure();
+		/**
+		 * Fires at the end of each Atom feed item.
+		 *
+		 * @since 2.0.0
+		 */
+		do_action( 'atom_entry' );
 
-	if ( get_comments_number() || comments_open() ) :
-		?>
-		<link rel="replies" type="<?php bloginfo_rss('html_type'); ?>" href="<?php the_permalink_rss() ?>#comments" thr:count="<?php echo get_comments_number()?>"/>
-		<link rel="replies" type="application/atom+xml" href="<?php echo esc_url( get_post_comments_feed_link(0, 'atom') ); ?>" thr:count="<?php echo get_comments_number()?>"/>
-		<thr:total><?php echo get_comments_number()?></thr:total>
-	<?php endif; ?>
+		if ( get_comments_number() || comments_open() ) :
+			?>
+		<link rel="replies" type="<?php bloginfo_rss( 'html_type' ); ?>" href="<?php the_permalink_rss(); ?>#comments" thr:count="<?php echo get_comments_number(); ?>"/>
+		<link rel="replies" type="application/atom+xml" href="<?php echo esc_url( get_post_comments_feed_link( 0, 'atom' ) ); ?>" thr:count="<?php echo get_comments_number(); ?>"/>
+		<thr:total><?php echo get_comments_number(); ?></thr:total>
+		<?php endif; ?>
 	</entry>
-	<?php endwhile ; ?>
+	<?php endwhile; ?>
 </feed>