Simplify error in validate_file_to_edit().

props MattyRob for initial patch.
fixes #25924.

Built from https://develop.svn.wordpress.org/trunk@27219


git-svn-id: http://core.svn.wordpress.org/trunk@27076 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/file.php

@@ -177,13 +177,13 @@ function validate_file_to_edit( $file, $allowed_files = '' ) {
 
 	switch ( $code ) {
 		case 1 :
-			wp_die( __('Sorry, can’t edit files with “..” in the name. If you are trying to edit a file in your WordPress home directory, you can just type the name of the file in.' ));
+			wp_die( __( 'Sorry, that file cannot be edited.' ) );
 
 		//case 2 :
 		//	wp_die( __('Sorry, can’t call files with their real path.' ));
 
 		case 3 :
-			wp_die( __('Sorry, that file cannot be edited.' ));
+			wp_die( __( 'Sorry, that file cannot be edited.' ) );
 	}
 }