* Ease Hypothesis shrinking
This is a tiny performance improvement for shrinking.
Unconditionally drawing and conditionally *using* these boolean flags minimises the impact of mutating other parts of an input on the structure here, which in turn means more attempts will be valid.
* Refactor Hypothesis strategy
Using the composite decorator allows for a much clearer imperative description of how the class is constructed.
* Split cmp into eq and order
Fixes#170
* Fix tests on old pypy3 versions
Old as in: currently on AP.
* Fix issue number and clarify newsfragment
* Clarify behavior and interaction between cmp/eq/order
* This sounds better
* Address Julian's review comments
* Missed a cmp
* Test the behavior of Attribute.cmp
* Make test more idiomatic
* Explain assumptions
* Clarify comment
* Grammar
* One more cmp!
* Add weakref parameter to attr.s()
#325
* Add weakref to simple_classes() strategy
* Rename changelog file with actual PR (420.change.rst)
* Add test_weakref_does_not_add_a_field()
* Add docstrings to new weakref tests
* Add missing blank line
* Correct weakref handling of __weakref__ attributes or an inherrited slot
* Correct typos and terms
* Rename to weakref_slot
* Parametrize more tests against weakref_slot True/False to expose trouble
* Check if __weakref__ has been inherited via a __dict__
* Correct copy/pasted comment
* Change weakref_slot default to True
* Tidy and correct weakref -> weakref_slot
Zac Hatfield-Dodds