Ticket #21281: 21281.patch

src/wp-includes/css/editor.css

@@ -884 +884 @@
         content: '\f475';
 }
 
+/* @noflip */
+.rtl i.mce-i-outdent,
+.rtl i.mce-i-indent {
+        -webkit-transform: scale( -1, 1 );
+        -ms-transform: scale( -1, 1 );
+        transform: scale( -1, 1 );
+}
+
 /* Editors */
 .wp-editor-wrap {
         position: relative;