Add change note and coverage badge to README

[skip ci]

Update PyPI links in readme.

Fix typo in test_persistence.py

CHANGES.rst

@@ -4,6 +4,11 @@
 4.3.1 (unreleased)
 ------------------
 
+- Reach and maintain 100% test coverage.
+
+- Simplify ``__init__.py``, including removal of an attempted legacy
+  import of ``persistent.TimeStamp``.
+
 - Add support for Python 3.7 and drop support for Python 3.3.
 
 - Build the CFFI modules (used on PyPy or when PURE_PYTHON is set) `at

README.rst

@@ -4,16 +4,19 @@
 .. image:: https://travis-ci.org/zopefoundation/persistent.svg?branch=master
         :target: https://travis-ci.org/zopefoundation/persistent
 
+.. image:: https://coveralls.io/repos/github/zopefoundation/persistent/badge.svg?branch=master
+        :target: https://coveralls.io/github/zopefoundation/persistent?branch=master
+
 .. image:: https://readthedocs.org/projects/persistent/badge/?version=latest
         :target: http://persistent.readthedocs.org/en/latest/
         :alt: Documentation Status
 
 .. image:: https://img.shields.io/pypi/v/persistent.svg
-        :target: https://pypi.python.org/pypi/persistent
-        :alt: PyPI
+        :target: https://pypi.org/project/persistent
+        :alt: Latest release
 
 .. image:: https://img.shields.io/pypi/pyversions/persistent.svg
-        :target: https://pypi.python.org/pypi/persistent
+        :target: https://pypi.org/project/persistent
         :alt: Python versions
 
 This package contains a generic persistence implementation for Python. It
@@ -22,7 +25,7 @@ a database such as the ZODB.
 
 Please see the Sphinx documentation (``docs/index.rst``) for further
 information, or view the documentation at Read The Docs, for either
-the latest (``http://persistent.readthedocs.io/en/latest/) or stable 
+the latest (``http://persistent.readthedocs.io/en/latest/``) or stable
 release (``http://persistent.readthedocs.io/en/stable/``).
 
 .. note::

persistent/tests/test_persistence.py

@@ -1746,7 +1746,7 @@ class PyPersistentTests(unittest.TestCase, _Persistent_Base):
             # Mimic what the real cache does
             if oid not in jar._cache._mru:
                 raise KeyError(oid)
-            raise AssertionError("Shold never get here")
+            raise AssertionError("Should never get here")
         jar._cache.mru = mru
         c1._p_accessed()
         self._checkMRU(jar, [])