Use a simple replacement for 'wp_title' filter in capital_P_dangit(), like we do for 'the_title'.

props nacin.
fixes #25796.
Built from https://develop.svn.wordpress.org/trunk@26122


git-svn-id: http://core.svn.wordpress.org/trunk@26034 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/formatting.php

@@ -3339,7 +3339,8 @@ function wp_basename( $path, $suffix = '' ) {
  */
 function capital_P_dangit( $text ) {
 	// Simple replacement for titles
-	if ( 'the_title' === current_filter() )
+	$current_filter = current_filter();
+	if ( 'the_title' === $current_filter || 'wp_title' === $current_filter )
 		return str_replace( 'Wordpress', 'WordPress', $text );
 	// Still here? Use the more judicious replacement
 	static $dblq = false;