</span><span class="p">,</span><span class="n">source_string</span><span class="p">(</span><span class="n">token_start</span><span class="p">:</span><span class="n">token_start</span><span class="p">))</span><span class="w">  </span><span class="o">/=</span><span class="w">  </span><span class="mi">0</span><span class="p">)</span><span class="w"> </span><span class="k">then</span>
<span class="k">         </span><span class="n">token_start</span><span class="w"> </span><span class="o">=</span><span class="w