In section 25.2.3.5, &quot;Option Flags and Directives&quot; at <meta http-equiv="content-type" content="text/html; charset=utf-8"><a href="http://docs.python.org/dev/library/doctest.html?highlight=doctest#doctest">http://docs.python.org/dev/library/doctest.html</a>, the code examples for doctest directives don&#39;t actually show the directives themselves; they seem to be hidden.