Xerces: Correct minor spelling mistake
@@ -89,7 +89,7 @@ void node2key (DOMNode const * n, Key const & parent, KeySet const & ks, Key & c
if (!ks.size ())
{ // we map the parent key to the xml root element
- // preserve the original name if its different
+ // preserve the original name if it is different
auto parentName = parent.rbegin ();
if (parentName != parent.rend () && (*parentName) != keyName)
{
