evil assert statements.
* Add an additional assert to the new test_name_attribute test that actually
  confirms that a hash created using each h.name results in a new hash sharing
  the same name.

Patch by Madison May.

Issue 18532: Added tests and documentation to formally specify the .name attribute on hashlib objects.

(Original patch by Mark Dickinson.)

Based on patch by Aaron Oakley

Thanks to Stefan Behnel for the report and proposed solution & test.