Index: package-lock.json
===================================================================
--- package-lock.json	(revision 50064)
+++ package-lock.json	(working copy)
@@ -356,9 +356,9 @@
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+			"resolved": "https://registry.npmjs.org/@wordpress/edit-post/-/edit-post-3.3.8.tgz",
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-				"@wordpress/block-library": "^2.4.6",
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@@ -14907,13 +15087,15 @@
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 					"dev": true,
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@@ -14925,7 +15107,8 @@
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@@ -14944,6 +15128,7 @@
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@@ -15077,7 +15267,8 @@
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@@ -15228,7 +15420,8 @@
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 			"integrity": "sha1-Y3PbdpCf5XDgjXNYM2Xtgop07us=",
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@@ -15421,6 +15614,7 @@
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 			"integrity": "sha1-WqADz76Uxf+GbE59ZouxxNuts2k=",
 			"dev": true,
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@@ -15488,7 +15682,8 @@
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 			"integrity": "sha1-uYTwh3/AqJwsdzzB73tbIytbBv4=",
-			"dev": true
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 			"integrity": "sha1-evjzA2Rem9eaJy56FKxovAYJ2nM=",
 			"dev": true,
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@@ -15708,7 +15904,8 @@
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@@ -15748,6 +15945,7 @@
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 			"integrity": "sha1-XIgDbPVl5d8FVYv8kR+GVt8hiIQ=",
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@@ -15758,7 +15956,8 @@
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 					"integrity": "sha1-KbvZIHinOfC8zitO5B6DeVNSKSQ=",
-					"dev": true
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@@ -15767,6 +15966,7 @@
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 			"integrity": "sha1-TRmIkbVRWRHXcajNnFSApGoHSkU=",
 			"dev": true,
+			"optional": true,
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@@ -15777,6 +15977,7 @@
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 			"integrity": "sha1-vm/zJwy1Xf19MGNkDegfJddTIjk=",
 			"dev": true,
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@@ -15802,6 +16003,7 @@
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 					"dev": true,
+					"optional": true,
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@@ -15811,6 +16013,7 @@
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 					"dev": true,
+					"optional": true,
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@@ -15821,6 +16024,7 @@
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 							"dev": true,
+							"optional": true,
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@@ -15870,6 +16074,7 @@
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 			"integrity": "sha1-0bFPOdLiy0q4xAmPdW/ksWTkc9Q=",
 			"dev": true,
+			"optional": true,
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@@ -16429,6 +16634,7 @@
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 			"integrity": "sha1-8htuQQFv9KfjFyDbxjoJAWvfmEU=",
 			"dev": true,
+			"optional": true,
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@@ -16683,6 +16889,7 @@
 			"resolved": "https://registry.npmjs.org/yauzl/-/yauzl-2.10.0.tgz",
 			"integrity": "sha1-x+sXyT4RLLEIb6bY5R+wZnt5pfk=",
 			"dev": true,
+			"optional": true,
 			"requires": {
 				"buffer-crc32": "~0.2.3",
 				"fd-slicer": "~1.1.0"
Index: package.json
===================================================================
--- package.json	(revision 50064)
+++ package.json	(working copy)
@@ -63,7 +63,7 @@
 		"@wordpress/autop": "2.2.0",
 		"@wordpress/blob": "2.3.0",
 		"@wordpress/block-editor": "2.0.3",
-		"@wordpress/block-library": "2.4.7",
+		"@wordpress/block-library": "2.4.8",
 		"@wordpress/block-serialization-default-parser": "3.1.0",
 		"@wordpress/blocks": "6.2.5",
 		"@wordpress/components": "7.3.2",
@@ -74,7 +74,7 @@
 		"@wordpress/deprecated": "2.2.0",
 		"@wordpress/dom": "2.2.5",
 		"@wordpress/dom-ready": "2.2.0",
-		"@wordpress/edit-post": "3.3.7",
+		"@wordpress/edit-post": "3.3.8",
 		"@wordpress/editor": "9.2.6",
 		"@wordpress/element": "2.3.0",
 		"@wordpress/escape-html": "1.2.0",
Index: src/wp-includes/blocks/rss.php
===================================================================
--- src/wp-includes/blocks/rss.php	(revision 50064)
+++ src/wp-includes/blocks/rss.php	(working copy)
@@ -80,7 +80,7 @@
 	}
 
 	$classes           = 'grid' === $attributes['blockLayout'] ? ' is-grid columns-' . $attributes['columns'] : '';
-	$list_items_markup = sprintf( "<ul class='%s'>%s</ul>", esc_attr( 'wp-block-rss' . $classes ), $list_items );
+	$list_items_markup = sprintf( "<ul class='%s'>%s</ul>", esc_attr( $class ), $list_items );
 
 	// PHP 5.2 compatibility. See: http://simplepie.org/wiki/faq/i_m_getting_memory_leaks.
 	$rss->__destruct();
@@ -93,8 +93,7 @@
  * Registers the `core/rss` block on server.
  */
 function register_block_core_rss() {
-	register_block_type(
-		'core/rss',
+	register_block_type( 'core/rss',
 		array(
 			'attributes'      => array(
 				'columns'        => array(
