sage

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gh-36537: refresh the maple(tm) interface This is cleaning and repairing the maple interface, so that all tests pass with maple 2019. ### :memo: Checklist - [x] The title is concise, informative, and self-explanatory. - [x] The description explains in detail what this PR is about. URL: https://github.com/sagemath/sage/pull/36537 Reported by: Frédéric Chapoton Reviewer(s): Kwankyu Lee