Improve P/R for 4294

Author: jwakely

xml/issue4294.xml

@@ -47,9 +47,21 @@ template<class charT>
 </code></pre>
 <blockquote>
 <p>
-<ins>-?- <i>Constraints</i>:
-<code>is_trivially_default_constructible_v&lt;charT&gt;</code> is `true`.
-</ins>
+<ins>-?- <i>Constraints</i>:</ins>
+<ul>
+<li>
+<ins><code>is_array_v&lt;charT&gt;</code> is `false`.</ins>
+</li>
+<li>
+<ins><code>is_trivially_copyable_v&lt;charT&gt;</code> is `true`.</ins>
+</li>
+<li>
+<ins><code>is_standard_layout_v&lt;charT&gt;</code> is `true`.</ins>
+</li>
+<li>
+<ins><code>is_trivially_default_constructible_v&lt;charT&gt;</code> is `true`.</ins>
+</li>
+</ul>
 </p>
 <p>-8- <i>Effects</i>: As if by:
 <blockquote>