Merged requested to merge bitbucket/merged-pr-629 into branch/py3.6
Created originally on Bitbucket by davidcellis (David Ellis)
Was already merged in Bitbucket before import, marked as merged by the import user
Fix failing test in test_float
- Coerce float subclasses returned by dunder float to float class
- Warning should be raised even if it's a float subclass being created
edit: Give the PR a useful name!