title: Deleting multiple keys in redis-rb
body: <p>Using redis-rb in a Rails app, the following doesn't work:</p>
  
  <pre><code>irb&gt; keys = $redis.keys("autocomplete*")
  =&gt; ["autocomplete_foo", "autocomplete_bar", "autocomplete_bat"]
  irb&gt; $redis.del(keys)
  =&gt; 0
  </code></pre>
  
  <p>This works fine:</p>
  
  <pre><code>irb&gt; $redis.del("autocomplete_foo", "autocomplete_bar")
  =&gt; 2
  </code></pre>
  
  <p>Am I missing something obvious? The source is just:</p>
  
  <pre><code># Delete a key.
  def del(*keys)
    synchronize do
      @client.call [:del, *keys]
    end
  end
  </code></pre>
  
  <p>which looks to me like it should work to pass it an array...?</p>