Don't use real example environment for examples containing \pnums.

source/locales.tex

@@ -5088,7 +5088,7 @@
 write a data file in a fixed format, regardless of a user's preference.
 
 \pnum
-\begin{example}
+\noteintro{Example}
 Here is an example of the use of locales in a library interface.
 
 \begin{codeblock}
@@ -5147,7 +5147,7 @@
   return s;
 }
 \end{codeblock}
-\end{example}
+\noteoutro{example}
 
 \pnum
 A locale object may be extended with a new facet simply by constructing
@@ -5158,7 +5158,7 @@
 which identifies your class interface as a new facet.
 
 \pnum
-\begin{example}
+\noteintro{Example}
 Classifying Japanese characters:
 
 \begin{codeblock}
@@ -5195,7 +5195,7 @@
 
 \pnum
 The new facet is used exactly like the built-in facets.
-\end{example}
+\noteoutro{example}
 
 \pnum
 \begin{example}