paragraph">
<p>Each group of changes (called a "hunk") in the textual diff output
is prefixed with a line of the form:</p>
</div>
<div class="literalblock">
<div class="content">
<pre>@@ -k,l +n,m @@ TEXT</pre>
</div>
</div>
<div class="paragraph">
<p>This is called a <em>hunk header</em>.  The "TEXT" portion is by default a line
that begins with an alphabet, an underscore or a dollar sign; this
matches what GNU <em>diff -p</em> output uses.  This default selection however
is not suited for som