commits: dfa97dadfd8551b4f06b8c5601fa47b6dea2c1a0

This data as json

sha	message	author_date	committer_date	raw_author	raw_committer	repo	author	committer
dfa97dadfd8551b4f06b8c5601fa47b6dea2c1a0	to_zarr(append_dim='dim0') doesn't need mode='a' (#3123) * to_zarr(append_dim='dim0') doesn't need mode='a' * Updated whats-new.rst * Default mode=None allows checking consistency with append_dim * Fix PEP8 issue * Moved mode handling from api.py to dataset.py * Fix closing bracket indentation	2019-07-29T15:54:44Z	2019-07-29T15:54:44Z	5416ffd189976d1fa74f3053c7f1455efaf9f7de	f10b21bed2846b879806f87039b77245b18e7671	13221727	4711805	1217238