e prepended to the line and the
characters after the pipe are appended at the end of the line.  If no pipe
character is present, the full string is prepended; for example, <tt>&quot;#&quot;</tt> for
Python files.  If empty double quotes are specified, the comment/uncomment
functions are disabled; for example, <tt>&quot;&quot;</tt> for JSON.
The default value is &quot;<tt>#</tt>&quot;.
</p>
</dd>
<dt><code>tabgives &quot;<var>string</var>&quot;</code></dt>
<dd><p>Make the &lt;Tab&gt; key produce the given <v