[issue43088] Regression in math.hypot

[Raymond Hettinger]

Raymond Hettinger <raymond.hettinger at gmail.com> added the comment:

>  I'd like to know what range of versions this version should apply for.

Only 3.8 and 3.9.

Prior to that, we used the C compiler's hypot() which tended to be very good but was implementation dependent, only covered the two argument case, and made no particular guarantees about accuracy, commutativity, or monotonicity.

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