diff -r 346c88efed21 -r 5e2f62d02dcd wp/wp-includes/feed-rss2.php
--- a/wp/wp-includes/feed-rss2.php	Mon Jun 08 16:11:51 2015 +0000
+++ b/wp/wp-includes/feed-rss2.php	Tue Jun 09 03:35:32 2015 +0200
@@ -8,8 +8,18 @@
 header('Content-Type: ' . feed_content_type('rss-http') . '; 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').'"?'.'>';
 
+/**
+ * Fires between the xml and rss tags in a feed.
+ *
+ * @since 4.0.0
+ *
+ * @param string $context Type of feed. Possible values include 'rss2', 'rss2-comments',
+ *                        'rdf', 'atom', and 'atom-comments'.
+ */
+do_action( 'rss_tag_pre', 'rss2' );
+?>
 <rss version="2.0"
 	xmlns:content="http://purl.org/rss/1.0/modules/content/"
 	xmlns:wfw="http://wellformedweb.org/CommentAPI/"
@@ -34,30 +44,32 @@
 	<description><?php bloginfo_rss("description") ?></description>
 	<lastBuildDate><?php echo mysql2date('D, d M Y H:i:s +0000', get_lastpostmodified('GMT'), false); ?></lastBuildDate>
 	<language><?php bloginfo_rss( 'language' ); ?></language>
-	<?php
-	$duration = 'hourly';
-	/**
-	 * Filter how often to update the RSS feed.
-	 *
-	 * @since 2.1.0
-	 *
-	 * @param string $duration The update period.
-	 *                         Default 'hourly'. Accepts 'hourly', 'daily', 'weekly', 'monthly', 'yearly'.
-	 */
-	?>
-	<sy:updatePeriod><?php echo apply_filters( 'rss_update_period', $duration ); ?></sy:updatePeriod>
-	<?php
-	$frequency = '1';
-	/**
-	 * Filter the RSS update frequency.
-	 *
-	 * @since 2.1.0
-	 *
-	 * @param string $frequency An integer passed as a string representing the frequency
-	 *                          of RSS updates within the update period. Default '1'.
-	 */
-	?>
-	<sy:updateFrequency><?php echo apply_filters( 'rss_update_frequency', $frequency ); ?></sy:updateFrequency>
+	<sy:updatePeriod><?php
+		$duration = 'hourly';
+
+		/**
+		 * Filter how often to update the RSS feed.
+		 *
+		 * @since 2.1.0
+		 *
+		 * @param string $duration The update period. Accepts 'hourly', 'daily', 'weekly', 'monthly',
+		 *                         'yearly'. Default 'hourly'.
+		 */
+		echo apply_filters( 'rss_update_period', $duration );
+	?></sy:updatePeriod>
+	<sy:updateFrequency><?php
+		$frequency = '1';
+
+		/**
+		 * Filter the RSS update frequency.
+		 *
+		 * @since 2.1.0
+		 *
+		 * @param string $frequency An integer passed as a string representing the frequency
+		 *                          of RSS updates within the update period. Default '1'.
+		 */
+		echo apply_filters( 'rss_update_frequency', $frequency );
+	?></sy:updateFrequency>
 	<?php
 	/**
 	 * Fires at the end of the RSS2 Feed Header.