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
282344188,MDExOlB1bGxSZXF1ZXN0MTU4NTQwODI1,1786,_plot2d: Rotate x-axis ticks if datetime subtype,2448579,closed,0,,,1,2017-12-15T07:43:19Z,2018-05-10T05:12:19Z,2018-01-03T16:37:56Z,MEMBER,,0,pydata/xarray/pulls/1786,"Rotate x-axis dateticks by default, just as for plot.line()

 - [x] Tests added (for all bug fixes or enhancements)
 - [x] Tests passed (for all non-documentation changes)
 - [x] Passes ``git diff upstream/master **/*py | flake8 --diff`` (remove if you did not edit any Python files)
 - [x] Fully documented, including `whats-new.rst` for all changes and `api.rst` for new API (remove if this change should not be visible to users, e.g., if it is an internal clean-up, or if this is part of a larger project that will be documented later)
","{""url"": ""https://api.github.com/repos/pydata/xarray/issues/1786/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,,13221727,pull
282339218,MDExOlB1bGxSZXF1ZXN0MTU4NTM3MTI2,1785,plot.line(): Draw multiple lines for 2D DataArrays.,2448579,closed,0,,,13,2017-12-15T07:14:25Z,2018-05-10T05:12:16Z,2017-12-31T17:16:17Z,MEMBER,,0,pydata/xarray/pulls/1785," - [x] Tests added (for all bug fixes or enhancements)
 - [x] Tests passed (for all non-documentation changes)
 - [x] Passes ``git diff upstream/master **/*py | flake8 --diff`` (remove if you did not edit any Python files)
 - [x] Fully documented, including `whats-new.rst` for all changes and `api.rst` for new API (remove if this change should not be visible to users, e.g., if it is an internal clean-up, or if this is part of a larger project that will be documented later)

Adds support for plotting multiple lines if `plot.line()` is provided with a 2D dataarray.

kwarg `x` lets you specify co-ordinate for x-axis.

Example:


![xarray-multiple-line](https://user-images.githubusercontent.com/2448579/34031085-96dfbaee-e124-11e7-8578-e97586257b7a.png)
","{""url"": ""https://api.github.com/repos/pydata/xarray/issues/1785/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,,13221727,pull