This release makes "arrays()" more pedantic about "elements"
strategies that cannot be exactly represented as array elements.
In practice, you will see new warnings if you were using a "float16"
or "float32" dtype without passing "floats()" the "width=16" or
"width=32" arguments respectively.
The previous behaviour could lead to silent truncation, and thus some
elements being equal to an explicitly excluded bound (issue #1899).
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