title: Is it possible to do block-comments in Google Colab?
body: <p>In <a href="https://en.wikipedia.org/wiki/IPython#Project_Jupyter" rel="noreferrer">Jupyter Notebook</a>, you can toggle/comment a block of selected code with <kbd>Ctrl</kbd> + <kbd>/</kbd>, but this doesn't work in Google Colaboratory notebooks. Is there a way to comment out several lines of Python code easily in a Colaboratory notebook?</p>
  <p>I've looked in the documentation, but I came up short.</p>