Fix: preserve original Figure DPI in pickle to prevent HiDPI doubling (macOSX)#32

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emerson-gray wants to merge 1 commit intomatplotlib__matplotlib-23476from

fix/dpi-pickle-original

Commits on Dec 24, 2025

figure: store unscaled original dpi in pickles to avoid HiDPI doubling on unpickle; add test for DPR=2 stability
emerson-gray
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