[definitions] Add missing 'Clause' to reference

tkoeppe · tkoeppe · commit 663bffad181f · 2017-02-27T11:02:55.000-10:00
diff --git a/source/lib-intro.tex b/source/lib-intro.tex
@@ -128,7 +128,9 @@
 \rSec1[definitions]{Definitions}
 
 \pnum
-\begin{note} \ref{intro.defs} defines additional terms used elsewhere in this International Standard. \end{note}
+\begin{note}
+Clause \ref{intro.defs} defines additional terms used elsewhere in this International Standard.
+\end{note}
 
 \def\definition{\definitionx{\subsection}}%
 
