Add blurb

rhettinger · rhettinger · commit 475bcfa7c2c0 · 2020-12-23T15:16:21.000-08:00
diff --git a/Misc/NEWS.d/next/Library/2020-12-23-15-16-12.bpo-38308.lB4Sv0.rst b/Misc/NEWS.d/next/Library/2020-12-23-15-16-12.bpo-38308.lB4Sv0.rst
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+Add optional *weights* to *statistics.harmonic_mean()*.

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	`1`	`+Add optional weights to statistics.harmonic_mean().`