<span class="s">&quot;First, thou shalt count to {0}&quot;</span><span class="w"> </span><span class="c1">// References the first argument</span>
<span class="s">&quot;Bring me a {}&quot;</span><span class="w">                  </span><span class="c1">// Implicitly references the first argument</span>
<span class="s">&quot;From {} to {}&quot;</span><span class="w">                  </span><span class="c1">// Same as &quot;From {0} to {1}&quot;</span>
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<p>The <em>format_spec</em> field con