Upgrade/Install: Escape the `%` in `width="100%"` in a `printf()` call in `Plugin_Upgrader_Skin::after()`.

Props afragen.
Fixes #47989.
Built from https://develop.svn.wordpress.org/trunk@46072


git-svn-id: http://core.svn.wordpress.org/trunk@45884 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/class-plugin-upgrader-skin.php

@@ -47,7 +47,7 @@ class Plugin_Upgrader_Skin extends WP_Upgrader_Skin {
 		if ( ! empty( $this->plugin ) && ! is_wp_error( $this->result ) && $this->plugin_active ) {
 			// Currently used only when JS is off for a single plugin update?
 			printf(
-				'<iframe title="%s" style="border:0;overflow:hidden" width="100%" height="170" src="%s"></iframe>',
+				'<iframe title="%s" style="border:0;overflow:hidden" width="100%%" height="170" src="%s"></iframe>',
 				esc_attr__( 'Update progress' ),
 				wp_nonce_url( 'update.php?action=activate-plugin&networkwide=' . $this->plugin_network_active . '&plugin=' . urlencode( $this->plugin ), 'activate-plugin_' . $this->plugin )
 			);

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.3-alpha-46071';
+$wp_version = '5.3-alpha-46072';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.