title: R data.table fread function to suppress warning message
body: <p>I want to import some text files with fread. Here is an example:</p>
  <pre><code>fread(text=&quot;a,b\nID_134235,'J'aime'\nID_134235,'J,aime'&quot;,quote=&quot;'&quot;)
  </code></pre>
  <p>I have to specify <code>quote=&quot;'&quot;</code>, because in the second column, I can have <code>'</code> or <code>,</code> in the text.</p>
  <p>Then I have a warning message:</p>
  <blockquote>
  <p>Warning in fread(text = &quot;a,b\nID_134235,'J'aime'\nID_134235,'J,aime'&quot;,
  quote = &quot;'&quot;) :   Found and resolved improper quoting in first 100
  rows. If the fields are not quoted (e.g. field separator does not
  appear within any field), try quote=&quot;&quot; to avoid this warning.</p>
  </blockquote>
  <p>I don't want to specify <code>quote=&quot;&quot;</code>, because it changes the nature of the import. I just want to suppress this message. Is there a way to do it.
  In fact, I have thousands of files to be read, and R Studio interface seems to dysfonction because of these messages.</p>