title: quotes around path cause bat file to stop working
body: <p>I have a issue I don't understand...
  I wrote a batch file to install some softwares, tried it and it works correctly.
  I gave it to a colleague who tried it and it failed apparently because he had spaces in the path where he launched the file.
  No problem ! Just gonna had some quotes and it will be alright I naively thought...
  Alhough it worked perfectly without the quotes, I got an error message saying "Option non valide - "/quiet"." (invalid option - "/quiet") and got the same with "/S".
  Here is the code:</p>
  
  <pre><code>echo Installation de Python 2.7.9
  start /wait "%~dp0\python-2.7.9.msi"  /quiet /qn /norestart 
  echo.
  
  echo Installation de NSIS
  start /wait "%~dp0\nsis-2.46-setup.exe" /S
  echo.
  </code></pre>