improve documentation

[Devon7]

--- ccl/doc/manual/debugging.ccldoc
+++ #<buffer debugging.ccldoc>
@@ -303,7 +303,7 @@
 	    ")
          (item "{param form}" ccldoc::=> "
 	      A form to execute before, after, or around the advised
-	      function. The form can refer to the variable arglist
+	      function. The form can refer to the variable {code arglist}
 	      that is bound to the arguments with which the advised
 	      function was called. You can exit from form with
 	      (return).