reverted:
--- b/core/themes/classy/templates/rdf/rdf-metadata.html.twig
+++ /dev/null
@@ -1,22 +0,0 @@
-{#
-/**
- * @file
- * Default theme implementation for empty spans with RDF attributes.
- *
- * The XHTML+RDFa doctype allows either <span></span> or <span /> syntax to
- * be used, but for maximum browser compatibility, W3C recommends the
- * former when serving pages using the text/html media type, see
- * http://www.w3.org/TR/xhtml1/#C_3.
- *
- * Available variables:
- * - metadata: Each item within corresponds to its own set of attributes,
- *   and therefore, needs its own 'attributes' element.
- *
- * @see template_preprocess_rdf_metadata()
- *
- * @ingroup themeable
- */
-#}
-{% for attributes in metadata %}
-  <span{{ attributes.addClass('rdf-meta', 'hidden') }}></span>
-{% endfor %}
only in patch2:
unchanged:
--- /dev/null
+++ b/core/themes/classy/templates/rdf-metadata.html.twig
@@ -0,0 +1,22 @@
+{#
+/**
+ * @file
+ * Default theme implementation for empty spans with RDF attributes.
+ *
+ * The XHTML+RDFa doctype allows either <span></span> or <span /> syntax to
+ * be used, but for maximum browser compatibility, W3C recommends the
+ * former when serving pages using the text/html media type, see
+ * http://www.w3.org/TR/xhtml1/#C_3.
+ *
+ * Available variables:
+ * - metadata: Each item within corresponds to its own set of attributes,
+ *   and therefore, needs its own 'attributes' element.
+ *
+ * @see template_preprocess_rdf_metadata()
+ *
+ * @ingroup themeable
+ */
+#}
+{% for attributes in metadata %}
+  <span{{ attributes.addClass('rdf-meta', 'hidden') }}></span>
+{% endfor %}