diff --git a/includes/form.inc b/includes/form.inc
index aa90eca691ad4a23f76d574641311cb448b5aa5b..9121a35a8e7b065c6ef51cc055f592d9e4e7775b 100644
--- a/includes/form.inc
+++ b/includes/form.inc
@@ -3685,6 +3685,8 @@ function form_pre_render_fieldset($element) {
  *   array_shift($args);
  *   array_shift($args);
  *   // We store the user's original input in $keywords, including any slashes.
+ *   // Note: A prepended or trailing slash will be removed. For example, if the
+ *   // user enters '/a/few/words/' then $keywords will contain 'a/few/words'.
  *   $keywords = implode('/', $args);
  *
  *   // Your code here.