More informative error message when theme files are not writable. Props hansengel. fixes #5783

git-svn-id: http://svn.automattic.com/wordpress/trunk@6772 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/theme-editor.php

@@ -135,7 +135,7 @@ if ($allowed_files) :
 ?>
 </p>
 <?php else : ?>
-<p><em><?php _e('If this file were writable you could edit it.'); ?></em></p>
+<p><em><?php _e('You need to make this file writable before you can save your changes. See <a href="http://codex.wordpress.org/Changing_File_Permissions">the Codex</a> for more information.'); ?></em></p>
 <?php endif; ?>
 	</form>
 	<?php