sha,message,author_date,committer_date,raw_author,raw_committer,repo,author,committer
a78c1e0115d38cb4461fd1aba93334d440cff49c,"dataset `__repr__` updates (#5580)

* Delegate `max_rows` from dataset `__repr__`

As discussed in https://github.com/pydata/xarray/issues/5545
the default setting of `display_max_rows` is sometimes less useful to
inspect datasets for completeness, and changing the option is not
backwards compatible. In addition, a concise and short output dataset
seems to be preferred by most people.

The compromise is to keep the dataset's `__repr__` short and tunable via
`xr.set_options(display_max_rows=...)`, and at the same time to enable
the output of all items by explicitly requesting `ds.coords`,
`ds.data_vars`, and `ds.attrs`. These explicit `__repr__`s also restore
backwards compatibility in these cases.

Slightly changes the internal implementation of `_mapping_repr()`:
Setting (leaving) `max_rows` to `None` means ""no limits"".

* tests: Update dataset `__repr__` tests [1/2]

Updates the dataset `__repr__` test to assure that the dataset output
honours the `display_max_rows` setting, not the `data_vars` output.

Discussed in https://github.com/pydata/xarray/issues/5545

* tests: Extend dataset `__repr__` tests [2/2]

Extends the dataset `__repr__` test to ensure that the output of
`ds.coords`, `ds.data_vars`, and `ds.attrs` is of full length as
desired.

Includes more dimensions and coordinates to cover more cases.

Discussed in https://github.com/pydata/xarray/issues/5545

* doc: Add what's new entry for `__repr__` changes

Sorted as a ""breaking change"" for 0.18.3 for now.

* Revert ""doc: Add what's new entry for `__repr__` changes""

This reverts commit 3dd645b3141cdb97567cc245aa836b22fab2b3da.

* doc: Add what's new entry for `__repr__` changes

Sorted as a ""breaking change"", for 0.19.1 for now.

* doc: Remove `attrs` from `__repr__` changes

Address comment from @keewis:
`.attrs` is a standard python dict, so there's no custom repr.

* tests: Remove `ds.attrs` formatting test

According to @keewis:
I don't think we need to test this because `attrs_repr` will only ever
be called by `dataset_repr` / `array_repr`: on its own, the standard
python `dict`'s `repr` will be used.

* tests: Fix no. of coordinates in formatting_repr

The number of coordinates changed to be the same as the number of
variables, which only incidentally was fixed to 40.
Updates the to-be-tested format string to use the same number of
variables instead of the hard-coded one, which might be subject to
change.",2021-08-21T22:51:02Z,2021-08-21T22:51:02Z,b87b8161def2ccc7bb2ae2db0a353c635685481d,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,28786187,19864447