Test commit instructions

@zkortum let's try something pretty simple here:

1. Create a blank .txt file with whatever title you'd like, and save it to path/to/rtgm-py-calculator/tests in your local repository.
2. Open up Git Bash, navigate to path/to/rtgm-py-calculator and run $git status. You should get something like the following in your output:

$ git status
On branch main
Your branch is up to date with 'origin/main'.

Untracked files:
  (use "git add <file>..." to include in what will be committed)
        tests/testCommit.txt

nothing added to commit but untracked files present (use "git add" to track)

3. Start tracking your new file using $git add tests/testCommit.txt. (try $git status again and see how the output changes.
4. Commit your change using $git commit -m "informative commit message".