title: Qt QDateTime toString("h:m:s ap") ap/a/AP/a missing
body: <p>I've noted the "ap/a/AP/a" is missing while converting a date to string. For "h:m:s ap", i.e., I get "11:5:42 ". The same happens for each of the "ap/a/AP/a" forms.</p>
  
  <p>What I'm missing?</p>
  
  <pre><code>void DecoderBr1::recordOnFile(QDateTime dateTime, QByteArray ba)
  {
      QString filename(dateTime.toString("yyyy MMMM dd@HH.mm.ss zzz ap"));
      filename.append(".log");
  
      Recorder recorder;
      recorder.recordFile(filename, ba);
  }
  </code></pre>