title: Better naming convention for Jupyter notebook
body: <p>When naming a Jupyter notebook, if spaces are used, i.e.</p>
  
  <pre><code>This is my notebook.ipynb
  </code></pre>
  
  <p>then it renders very nicely when opened with the web browser. However, spaces are evil on the command line environment. But if instead:</p>
  
  <pre><code>This_is_my_notebook.ipynb
  </code></pre>
  
  <p>or</p>
  
  <pre><code>This-is-my-notebook.ipynb
  </code></pre>
  
  <p>then the title rendered does <em>not</em> look as good. Any suggestions for an alternative convention but still look somewhat nice? </p>