[class.temporary] Add paragraph number and split off example into its own paragraph. (#1211)

Author: jensmaurer

source/special.tex

@@ -547,6 +547,7 @@
 \end{example} \begin{note} This may introduce a dangling reference, and implementations are encouraged to issue a warning in such a case. \end{note}
 \end{itemize}
 
+\pnum
 The destruction of a temporary whose lifetime is not extended by being
 bound to a reference is sequenced before the destruction of every
 temporary which is constructed earlier in the same full-expression.
@@ -571,8 +572,9 @@
 the temporary shall be destroyed after
 \tcode{obj2}
 is destroyed.
-\begin{example}
 
+\pnum
+\begin{example}
 \begin{codeblock}
 struct S {
   S();