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2017-06-22
- Implemented ``endswith`` and ``contains`` functional filters.
- Added tests for ``wildcard``, ``exists``, ``exclude`` and ``isnull`` filters.
Improved ``range`` filter tests.
- Improve ``more_like_this`` helper test.
- Improve ordering tests.
- Two additional arguments added to the ``more_like_this`` helper:
``min_doc_freq`` and ``max_doc_freq``.
- Minor documentation improvements.