title: Visual Studio Code (Mac OS) rename symbol doesn't work
body: <p>When I right click and try to rename a variable name in Microsoft Visual Studio Code on Mac OS Mojave, it prompts for the new name, I hit enter and nothing happens. </p>
  
  <p>I have Python extension and Latex extension installed.</p>
  
  <p>Usually there are no errors, no nothing. </p>
  
  <p>Sometimes, there's a little box that pops up saying "No Result. No Result".</p>
  
  <p>The python interpreter I selected was a Conda install.</p>
  
  <p>I ensured rope, and pylint were installed.</p>
  
  <p>Expected behaviour:
  right click > rename symbol > type new name > enter > all instances of variable renamed.</p>
  
  <p>Observed behaviour
  right click > rename symbol > type new name > enter > variable has same name everywhere, including spot of renaming.</p>