title: Pandas to_csv method's option quoting=csv.QUOTE_MINIMAL is NOT working
body: <p>Pandas <code>DataFrame.to_csv</code> method's option <code>quoting=csv.QUOTE_MINIMAL</code> seems not working.</p>
  <p>I have following input tab delimited data, In the following example -&gt; denotes tab and . denotes space chars.</p>
  <p><code>Jhon-&gt;35-&gt;123.Vroom.St-&gt;01120</code></p>
  <p>After using <code>DataFrame.to_csv</code> and option quoting=csv.QUOTE_MINIMAL` I am expecting following output.</p>
  <p><code>Jhon 35 &quot;123 Vroom St&quot; 01120</code></p>
  <p>Which means quote only address values where there is space in the delimited data and do not quote if no space.</p>
  <pre><code>df.to_csv(file,
            sep='\t',
            header=False,
            index=False,
            quoting=csv.QUOTE_MINIMAL)
  </code></pre>
  <p>However, I am getting following output. There is no quote on the address.</p>
  <p><code>Jhon 35 123 Vroom St 01120</code></p>
  <p>Using option quoting=csv.QUOTE_ALL` getting me below which I don't want.</p>
  <p><code>&quot;Jhon&quot; &quot;35&quot; &quot;123 Vroom St&quot; &quot;01120&quot;</code></p>
  <p>Could someone please help me what's wrong here?</p>
  <p>Thanks.</p>