Colin@shinmera I did it across SBCL, ECL, and ABCL, mostly because those are the ones I care about. Even just doing ECL taught me that it and SBCL don't have the same equal behaviour (one considers :version, the other doesn't).
I should probably do more, but back when I was testing transducers and had half the world's CL implementations installed, I found many were just broken.
Do you have a recommended list?
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