This is a separate section from the Contributing Guidelines page. It will contain a small guide on testing things you wish to implement for bugs & other issues, which is crucial to do before submitting a Pull Request to the repository.
Can't work without tools, right? Here's a list of simple but effective tools you can use for testing & fixing bugs.
Atom - One of the most prominent text editors used by MAS contributors, Atom has many tools & features that allow for efficient and clean work on files that are being edited. It even has tools for fixing merge conflicts.
Microsoft Visual Studio Code - Lightweight and takes only a few minutes to install. Highly recommended for dialogue writing.