This release adds the "hypothesis.target()" function, which implements
experimental support for targeted property-based testing (issue
#1779).
By calling "target()" in your test function, Hypothesis can do a hill-
climbing search for bugs. If you can calculate a suitable metric such
as the load factor or length of a queue, this can help you find bugs
with inputs that are highly improbably from unguided generation -
however good our heuristics, example diversity, and deduplication
logic might be. After all, those features are at work in targeted PBT
too!
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