Define "delimiter", as per a complaint in the comments.
</highlight>
</example>
+ <p>The character which is used to separate (or "delimit") the
+ various parts of the substituion string is referred to as the
+ "delimiter", and it is most common to use a slash for this
+ purpose.</p>
+
<p>If either the pattern or the substitution contain a slash
- character then an alternative delimiter should be used:</p>
+ character then an alternative delimiter may be used to make the
+ directive more readable:</p>
<example><title>Example of using an alternate delimiter</title>
<highlight language="config">
