tional argument. If you need
      pure format substitution, use special flag <code class="code">_</code> to discard the
      extraneous argument: conversion <code class="code">%_(&nbsp;fmt&nbsp;%)</code> reads a format string
      <code class="code">rf</code> and then behaves the same as format string <code class="code">rf</code>.  Hence, if <code class="code">s</code> is
      the string <code class="code"><span class="string">"\"%4d\"1234.00"</span></code>, then <code class="code"><span class="construc