title: %run on files with space in names
body: <p>I'm trying to use the magic command %run on a notebook which has spaces in the filename.</p>
  
  <pre><code>%run Crazy Code.ipynb
  ERROR:root:File `'Crazy.py'` not found.
  </code></pre>
  
  <p>Is there a way around this without changing the file name? 
  I have a lot of notebooks whose names have spaces in between words; I find it easier to read.</p>