[distributions] Fix broadcasting error in LogNormal, TransformedDistribution #7269
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fritzo
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ezyang,
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ezyang
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This replaces two in-place operations
+=,-=with non-in-place operations= ... +,= ... -so that small-shaped samples can be scored inTransformedDistributionswith large-shaped base distribution parameters. The motivating example isLogNormal:Tested
LogNormalthat also exercisesTransformedDistribution