Improve tag semantics

Co-authored-by: George Peter Banyard <[email protected]>

language/types/array.xml

@@ -965,7 +965,7 @@ $error_descriptions[8] = "This is just an informal notice";
    <type>string</type>, <type>bool</type> and <type>resource</type>,
    converting a value to an <type>array</type> results in an array with a single
    element with index zero and the value of the scalar which was converted. In
-   other words, <literal>(array) $scalarValue</literal> is exactly the same as
+   other words, <code>(array) $scalarValue</code> is exactly the same as
    <literal>array($scalarValue)</literal>.
   </para>