id,node_id,number,title,user,state,locked,assignee,milestone,comments,created_at,updated_at,closed_at,author_association,active_lock_reason,draft,pull_request,body,reactions,performed_via_github_app,state_reason,repo,type
371219949,MDExOlB1bGxSZXF1ZXN0MjIzNzE2MzQ3,2491,Dataset.copy docstring matches behavior,10374429,closed,0,,,3,2018-10-17T18:54:21Z,2018-10-23T05:59:53Z,2018-10-23T05:59:46Z,CONTRIBUTOR,,0,pydata/xarray/pulls/2491," - [ ] Closes #2490

This makes the docstring of Dataset.copy match the actual behavior. 

However, I noticed that DataArray.copy has the opposite behavior for the deep keyword. Is this intentional, or are they supposed to behave the same way?
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371176463,MDU6SXNzdWUzNzExNzY0NjM=,2490,Dataset.copy docstring has a typo,10374429,closed,0,,,1,2018-10-17T17:00:37Z,2018-10-23T05:59:46Z,2018-10-23T05:59:46Z,CONTRIBUTOR,,,,"The docstring of [Dataset.copy](https://github.com/pydata/xarray/blob/9f4474d657193f1c7c9aac25bb2edf94755a8593/xarray/core/dataset.py#L715-L730) states that the default of deep is True, but in the code it is False. 
","{""url"": ""https://api.github.com/repos/pydata/xarray/issues/2490/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,completed,13221727,issue
353463740,MDU6SXNzdWUzNTM0NjM3NDA=,2379,Passing origin keyword to DataArray.plot.imshow does not behave as expected,10374429,closed,0,,,1,2018-08-23T16:41:27Z,2018-09-06T03:50:37Z,2018-09-06T03:50:37Z,CONTRIBUTOR,,,,"#### Code Sample
```python
from numpy import arange
from xarray import DataArray
import matplotlib.pyplot as plt

a = DataArray(arange(100).reshape((10,10)), dims=('x', 'y'))

print('a[0, 0] ==', a.loc[0, 0])

for origin in ('upper', 'lower'):
    a.plot.imshow(size=2, origin=origin)
    plt.title('origin=%s' % origin)
plt.show()
```
#### Problem description

The 'upper' case should plot the [0,0] block in the top left, and 'lower' should plot it in the bottom left, but the actual behavior is opposite. Passing origin='lower' also fails to flip the y-axis labels.

![upper](https://user-images.githubusercontent.com/10374429/44538938-c39c2a00-a6d0-11e8-9f52-7135c0e66c3c.png)

![lower](https://user-images.githubusercontent.com/10374429/44538941-c72fb100-a6d0-11e8-8a71-3f446cc84a89.png)

#### Output of ``xr.show_versions()``

<details>

INSTALLED VERSIONS
------------------
commit: None
python: 3.6.5.final.0
python-bits: 64
OS: Linux
OS-release: 4.18.3-arch1-1-ARCH
machine: x86_64
processor: 
byteorder: little
LC_ALL: en_US.UTF-8
LANG: en_US.UTF-8
LOCALE: en_US.UTF-8

xarray: 0.10.7
pandas: 0.23.1
numpy: 1.13.3
scipy: 1.0.0
netCDF4: 1.3.1
h5netcdf: None
h5py: 2.7.1
Nio: None
zarr: None
bottleneck: 1.2.1
cyordereddict: None
dask: 0.18.1
distributed: 1.22.0
matplotlib: 2.2.2
cartopy: None
seaborn: 0.8.1
setuptools: 39.2.0
pip: 10.0.1
conda: 4.5.10
pytest: 3.6.2
IPython: 6.4.0
sphinx: 1.7.5

</details>
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