Robert Muir created LUCENE-8023:
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Summary: Remove divide-by-zero formula hacks across sim impls
Key: LUCENE-8023
URL: https://issues.apache.org/jira/browse/LUCENE-8023
Project: Lucene - Core
Issue Type: Bug
Reporter: Robert Muir
Follow-up to LUCENE-8020
With the scoring api no longer passing e.g. docFreq=0 in corner cases such as
SpanOrQuery, we can revert formula hacks that we added to many similarities. It
may be very significant for ranking but it removes confusion and makes it
possible to have good explain() etc.
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