Update xml/issue4442.xml

Co-authored-by: Jonathan Wakely <[email protected]>

Author: tomaszkam

xml/issue4442.xml

@@ -32,7 +32,7 @@ template<class T>
 <p>-7- <i>Mandates</i>: `T` is an object type.</p>
 <p>-8- <i>Returns</i>: A reflection of the object designated by `expr`.</p>
 <p>-9- <i>Throws</i>: `meta::exception`
-<ins>if for lvalue constant expression `E` that computes object referred by `expr`, `E`</ins>
+<ins>if for an lvalue constant expression `E` that computes the object referred by `expr`, `E`</ins>
 <del>unless `expr`</del> is <ins>not</ins> suitable for use as a constant template argument
 for a constant template parameter of type <tt>T&amp;</tt> (<sref ref="[temp.arg.nontype]"/>).</p>
 </blockquote>