custom errors that do not display traceback

[edublancas]

In some cases, we need to raise errors where showing the internal traceback isn't helpful to the user. So far, we've been using UsageError. However, it doesn't fit all situations and we'd like to customize it with more descriptive names. Unfortunately, subclassing UsageError doesn't work:

So we need to find out a way to tell IPython not to display the traceback for certain exceptions

[edublancas]

Update: I found the root cause and opened an issue in the IPython repo (ipython/ipython#14024)