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
1973472421,PR_kwDOAMm_X85eZF4x,8400,Better attr diff for `testing.assert_identical`,2448579,closed,0,,,2,2023-11-02T04:15:09Z,2023-11-04T20:25:37Z,2023-11-04T20:25:36Z,MEMBER,,0,pydata/xarray/pulls/8400,"- [ ] User visible changes (including notable bug fixes) are documented in `whats-new.rst`


This gives us better reprs where only differing attributes are shown in the diff.

On main:
```
...
Differing coordinates:
L * x        (x) <U1 'a' 'b'
    foo: bar
    same: same
R * x        (x) <U1 'a' 'c'
    source: 0
    foo: baz
    same: same
...
```

With this PR:
```
Differing coordinates:
L * x        (x) %cU1 'a' 'b'
    Differing variable attributes:
        foo: bar
R * x        (x) %cU1 'a' 'c'
    Differing variable attributes:
        source: 0
        foo: baz

```","{""url"": ""https://api.github.com/repos/pydata/xarray/issues/8400/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,,13221727,pull