merge py3.7 into release

--HG--
branch : release-pypy3.7-v7.x
2 jobs for release-pypy3.7-v7.3.6rc3 in 28 minutes and 20 seconds
latest
Status Name Job ID Coverage
  Test
passed check_rpython_annotations #252720

00:05:22

passed hpy_tests #252721

00:28:20