title: PDF Download option in Jupyter Notebook
body: <p>I have installed Miktex and Pandoc, followed by that when I try to download the notebook in PDF, I get the pop up to install missing packages. It says, the package will be retrieved from this source 'Random package repository'. I am new to Python so wanted to check if it was safe to go ahead and click Install.
  <img src="https://i.stack.imgur.com/3u6cS.png" alt="" /></p>