Apply suggestions from code review and makes a few additional improvements

Author: rodrigoprimo

WordPress/Docs/PHP/PregQuoteDelimiterStandard.xml

@@ -5,19 +5,19 @@
     >
     <standard>
     <![CDATA[
-    Passing the $delimiter parameter to preg_quote() is strongly recommended. If it is not passed, the default delimiters `/` are presumed, which is often wrong.
+    Passing the $delimiter parameter to preg_quote() is strongly recommended to ensure the delimiter used in the regex is properly escaped.
     ]]>
     </standard>
     <code_comparison>
-        <code title="Valid: The delimiter is included.">
+        <code title="Valid: The delimiter parameter is passed.">
         <![CDATA[
-preg_quote( $dir, '#' )
+preg_quote( $dir, <em>'/'</em> );
         ]]>
         </code>
-        <code title="Invalid: The delimiter is not included.">
+        <code title="Invalid: The delimiter parameter is missing.">
         <![CDATA[
-preg_quote( $dir );
+preg_quote( $dir<em></em> );
         ]]>
         </code>
     </code_comparison>
-</documentation>
+</documentation>