[Checkins] [zopefoundation/zope.interface] 2f7070: Get as close to 100% coverage as possible.

[GitHub]

  Branch: refs/heads/coverage
  Home:   https://github.com/zopefoundation/zope.interface
  Commit: 2f7070393e211f37418407f099b7526fc5aa8167
      https://github.com/zopefoundation/zope.interface/commit/2f7070393e211f37418407f099b7526fc5aa8167
  Author: Jason Madden <jamadden at gmail.com>
  Date:   2017-06-09 (Fri, 09 Jun 2017)

  Changed paths:
    M .coveragerc
    M src/zope/interface/adapter.py
    M src/zope/interface/advice.py
    M src/zope/interface/declarations.py
    M src/zope/interface/interface.py
    M src/zope/interface/tests/advisory_testing.py
    M src/zope/interface/tests/dummy.py
    M src/zope/interface/tests/odd.py
    M src/zope/interface/tests/test_adapter.py
    M src/zope/interface/tests/test_advice.py
    M src/zope/interface/tests/test_declarations.py
    M src/zope/interface/tests/test_interface.py
    M src/zope/interface/tests/test_registry.py
    M src/zope/interface/tests/test_verify.py
    M src/zope/interface/verify.py

  Log Message:
  -----------
  Get as close to 100% coverage as possible.

Without conflicting with #86.

This is almost entirely trivial changes:

- Make dummy methods that should never be called either raise
  NotImplementedError or call self.fail() in tests.
- Standardize the no-coverage pragma
- Add a few pragmas where coverage varies across
  versions/implementations, mostly for the sake of tox (travis should
  hit them all).