an class="op">{</span><span class="nam">end_y</span><span class="op">}</span><span class="fst">"</span><span class="op">)</span>&nbsp;</span><span class="r"></span></p>
    <p class="pln"><span class="n"><a id="t87" href="#t87">87</a></span><span class="t">        <span class="com"># Arc if c1_exposed</span>&nbsp;</span><span class="r"></span></p>
    <p class="mis show_mis"><span class="n"><a id="t88" href="#t88">88</a></span><span class="t">        <span class="key">if</span> <span class="nam">c1_exposed<