"Run and Debug": extension already exists

[raineorshine]

In CONTRIBUTING.md under First Time Setup, I ran into a snag on Step 4:

4. Run extension using VS Code's "Run and Debug" menu

The project build successfully, VS Code relaunches, and then I get an error that says "Activating extension 'vscodevim.vim' failed: command 'type' already exists:

It appears that all existing extensions were activated, so the dev version of the extension that was dynamically loaded conflicted with the prod version installed from the marketplace. I was able to work around the issue by running "Developer: Reload with Extensions Disabled" in the new window.

I just wanted to check if this is expected, or if I'm missing something. I can update the README if that seems appropriate.