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Summary
Whilst working on #1735, I noticed it was hard to debug the code, this change adds a fairly opinionated way to debug the code when developing the doorkeeper gem. Additionally I've fixed the warning in the tests that I mentioned in #1732.
Now when developing in either the code or the specs, you can use the
debugger
keyword to jump into an interactive debugging session.Other Information
Why include irb in the Gemfile? That's been recommended by the irb authors, due to irb bundled with ruby frequently being out of date with the state of irb development.