een <tt>0</tt> and
<tt>RE_DUP_MAX</tt>:
</p>

<ol>
<li><tt>{</tt><i>m</i><tt>,</tt><i>n</i><tt>}</tt></li>
<li><tt>{</tt><i>m</i><tt>,}</tt></li>
<li><tt>{</tt><i>m</i><tt>}</tt></li>
</ol>

<p>
An atom followed by [1] matches a sequence of <i>m</i> through <i>n</i>
(inclusive) matches of the atom.  An atom followed by [2]
matches a sequence of <i>m</i> or more matches of the atom.  An atom
followed by [3] matches a sequence of exactly <i>m</i> matches of the
atom.
</p>


<p>
Adding a <tt>?</tt> to a repeat