[Issue 23677] log1p Documentation Doesn't Match Implementation

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=23677

--- Comment #2 from John Hall <john.michael.hall at gmail.com> ---
I double-checked and log1p doesn't provide the same accuracy as the CEPHES
implementation for doubles.

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