updates formatting

Author: ClimbsRocks

docs/source/feature_responses.rst

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 Background
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+==========
 
 People love linear models for their explainability. Let's take a look at the classic Titanic example, and say that th "Fare" feature has a coefficient of 0.1. The way it's classically interpreted, that means that, holding all else equal, for every unit increase in fare, the person's likelihood of surviving increased by 10%.