react-workshop-app

What: Closes #298 on react-fundamentals Why: The helper for Alfred the alert is used to give hints on why tests failed. It does so by raising a custom error. In order to not bloat the terminal window with stack traces, the code clears the error's property. It turns out that the stack is what's show in the terminal when tests fail. So when tests fail and the stack is set to a blank string, Alfred the alert's helpful tips don't show up in your terminal. :( How: When investigating, it looks like the stack included both the error's message _and_ a stack trace. So instead of clearing the stack, I replaced the stack's content with just the error's message. Now, only the error message shows up when a test fails. Checklist: [ ] Documentation [x] Tests Existing tests still pass. If necessary, I can add a test that asserts the stack equals the message passed in the constructor? [x] Ready to be merged