ar>string</var>.  Useful for languages like
Python that want to see only spaces for indentation.
This overrides the setting of the <code>tabstospaces</code> option.
</p>
</dd>
<dt><code>color [bold,][italic,]<var>fgcolor</var>,<var>bgcolor</var> &quot;<var>regex</var>&quot; &hellip;</code></dt>
<dd><p>Paint all pieces of text that match the extended regular expression &quot;regex&quot;
with the given foreground and background colors, at least one of which must
be specified.  Valid color names are:
<code>red