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Fix significant-digit rounding after fractional carry - #1388
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vera-rubin wants to merge 1 commit into
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When significant-digit rounding adds a digit, fractional padding uses the original exponent and inserts an extra zero.
We adjust the padding exponent after a carry so the result keeps its magnitude and required significant digits.
We've added a regression test and verified it with the number formatting tests and doctests.
Fixes #1387
— ChipLab