One of the coolest things about Ruby: you can open up all kinds of internal functions and monkey-patch them to your heart's content when things go weird.
One of the worst things about Ruby: an author of a third-party library you don't even know you depend on can open up and monkey-patch the `Array#dup` method – yes, the way that you make copies of an array – and you have no idea why you can suddenly no longer log into your web app anymore.
There went a half-day.
@pence That reminds me of LaTeX.
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