<?xml version="1.0"?> <!DOCTYPE para PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN" "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd"> <para>There are several undocumented settings for <varname>debug</varname>, among them <literal>3.27</literal> to enable a complete trace and <literal>3.8</literal> to debug the spell checker. For a complete list of the possible settings, see <filename class="headerfile">edit/debug.h</filename>.</para>