dflow">while</span>(idx &gt;= 1)     </div>
<div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;     <span class="comment">! Sort the slice of vec between lower(idx) and upper(idx)</span></div>
<div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;     low = lower(idx)</div>
<div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;     high = upper(idx) - 1</div>
<div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#1