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  <pre><span class="ruby-comment cmt"># File lib/rack/utils.rb, line 504</span>
      <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">delete</span>(<span class="ruby-identifier">k</span>)
        <span class="ruby-identifier">canonical</span> = <span class="ruby-identifier">k</span>.<span class="ruby-identifier">downcase</span>
        <span class="ruby-identifier">result</span> = <span class="ruby-keyword kw">super</span> <span class="ruby-ivar">@names</span>.<span class="ruby-identifier">delete</span>(<span class="ruby-identifier">canonical</span>)
        <span class="ruby-ivar">@names</span>.<span class="ruby-identifier">delete_if</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">name</span>,<span class="ruby-operator">|</span> <span class="ruby-identifier">name</span>.<span class="ruby-identifier">downcase</span> <span class="ruby-operator">==</span> <span class="ruby-identifier">canonical</span> }
        <span class="ruby-identifier">result</span>
      <span class="ruby-keyword kw">end</span></pre>
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