CHANGED

• Updated the _binary_op method in xarray/core/dataset.py to incorporate logic for handling the keep_attrs option. The method now includes checks for keep_attrs and preserves attributes accordingly during binary operations with Dataset objects.
• Modified the arithmetic methods in the Dataset class, such as __add__ and __sub__, to accept a keep_attrs parameter which is passed through to the _binary_op method. This enhancement allows end-users to control attribute preservation on a per-operation basis.
• Added new tests in xarray/tests/test_dataset.py to verify the functionality of keep_attrs during binary operations with Dataset objects. These tests ensure that attributes are preserved as expected when performing arithmetic operations on datasets.
• All changes have been made with adherence to PEP8/flake8 standards, and comprehensive unit tests have been included to cover the new logic. Local tests have been successfully executed to identify and rectify any errors before submitting the PR.