Greg Ichneumon Brown 639b7278d9 Docs: clarify calculation of sigma and lambda in function_score (#20267) ...

- Using log() to indicate natural log can add some confusion when trying to further adjust/tweak scores. Other parts of the API (field_value_factor on this same page) use 'ln' and 'log', so this change should be more consistent
- Fixes #20027
- I generated the images using http://latex2png.com/ at a resolution of 150 which seemed to be about the same size as before

2016-09-02 14:41:07 +02:00

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