hgrecco/pint — pull request #95 by jturner314 (2014-01-28 03:45:21+00:00)
Title: Make iadd_sub and add_sub private to _Quantity

Rename `iadd_sub` to `_iadd_sub`, and rename `add_sub` to `_add_sub`. These methods should not be publicly exposed. Instead, users of the `_Quantity` class should use operators.