<pre><span></span><span class="w">      </span><span class="k">program </span><span class="n">demo_fmt</span><span class="w"></span>
<span class="w">      </span><span class="k">use</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">M_msg</span><span class="p">,</span><span class="w"> </span><span class="k">only</span><span class="w"> </span><span class="p">:</span><span class="w"> </span><span class="n">fmt</span><span class="w"></span>
<span class="w">      </s