Fix awkward printing issues

[juliasilge]

There are some minor printing issues that came to light when making the testing snapshots:

This should be "XGBoost" or all lower case:

Discretizing variables using XgBoost all_predictors()

I'm hoping we can do better than this for the WOE printing:

WoE version against outcome structure(list(~Status), .Names = "", class = c("quosures", "list"
  )) for Job, Home

[github-actions]

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