proper sequence
</td></tr><tr valign="top"><td valign="baseline" nowrap><i>from-end</i></td><td valign="baseline">&nbsp;&nbsp;&nbsp;&nbsp;</td><td valign="baseline"> A <a href="ref-glossary.html#id86">generalized&nbsp;boolean</a> (default is <code>nil</code>)
</td></tr><tr valign="top"><td valign="baseline" nowrap><i>test</i></td><td valign="baseline">&nbsp;&nbsp;&nbsp;&nbsp;</td><td valign="baseline"> A <a href="ref-glossary.html#id80">function&nbsp;designator</a> specifying a <a href="ref-glossary.html#id