[temp.class] Reorganize examples into a separate paragraph

Author: tkoeppe

source/templates.tex

@@ -1362,21 +1362,16 @@
 \term{template}
 defines the layout and operations
 for an unbounded set of related types.
-\begin{example}
-a single class template
-\tcode{List}
-might provide a common definition for
-list of
-\tcode{int},
-list of
-\tcode{float},
-and list of pointers to
-\tcode{Shape}s.
-\end{example}
 
+\pnum
 \begin{example}
-An array class template might be declared like this:
-
+A single class template
+\tcode{List}
+might provide an unbounded set of class definitions:
+one class \tcode{List<T>} for every type \tcode{T},
+each describing a linked list of elements of type \tcode{T}.
+Similarly, a class template \tcode{Array} describing a contiguous,
+dynamic array might be defined like this:
 \begin{codeblock}
 template<class T> class Array {
   T* v;
@@ -1387,16 +1382,11 @@
   T& elem(int i) { return v[i]; }
 };
 \end{codeblock}
-
-\pnum
-The prefix
-\tcode{template}
-\tcode{<class}
-\tcode{T>}
+The prefix \tcode{template<class T>}
 specifies that a template is being declared and that a
 \grammarterm{type-name}
 \tcode{T}
-will be used in the declaration.
+may be used in the declaration.
 In other words,
 \tcode{Array}
 is a parameterized type with