Ticket #31255: 31255.patch

src/wp-includes/js/tinymce/plugins/wordpress/plugin.js

@@ -395 +395 @@
         // Remove spaces from empty paragraphs.
         editor.on( 'BeforeSetContent', function( event ) {
                 if ( event.content ) {
-                        event.content = event.content.replace( /<p>(?:&nbsp;|\u00a0|\uFEFF| )+<\/p>/gi, '<p></p>' );
+                        event.content = event.content.replace( /<p>(?:&nbsp;|\u00a0|\uFEFF| )*<\/p>/gi, '<p><br /></p>' );
                 }
         });