Fixed the formatting in the user guide.

guide/mu/guide.dtx

@@ -411,8 +411,9 @@
         For more information about the effects of the draft option
         on various packages, see
         \url{http://tex.stackexchange.com/a/49369/70941}.
-      } with the draft option specified. This can be useful, if you
-      are going to print and proofread a draft of your document.
+      } with the \thguide@itemfmt{draft} option specified. This can
+      be useful, if you are going to print and proofread a draft of
+      your document.
     \item[\thguide@default final]
       Unlike the \thguide@itemfmt{draft} option, this option
       typesets the release version of the document.