title: Pycharm Todo Keyword not 'registering' in modules that are in venv
body: <p>I haven't found this question asked anywhere else so I thought I'd head over to SO to ask. I am working with a project in python and have my all my files included in a venv. I noticed that the todo keyword when placed in a comment like so, <code># todo mark something to do here for later</code>, is not working. When I create a file at the project level and don't include it in my venv, the todo keyword highlights and shows as a todo item for me. My settings under Editor > Todo are correct and have never been altered either. I am using Pycharm version 2018.3.2 Community edition. </p>
  
  <p>If anyone can assist with this issue, I would greatly appreciate it.</p>
  
  <p>Thanks</p>