https://github.com/libgeos/geos/pull/937 switches to using DoubleDouble computation for line intersection. This improves the accuracy of calculating line intersection points.
This fixes some egregious bugs in spatial predicate evaluation (e.g. https://github.com/libgeos/geos/issues/933 and https://github.com/locationtech/jts/issues/396). However, It does change some overlay results. This may cause some failures in downstream integration tests. Is there any objection to backporting this fix to older versions (i.e. 3.12 and possibly further back?)
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