e4723362c4
Changes logic to store diffs in `git_diff` because the original has
stored them in a list:
```
{1, 2, 3} => {added = 1, modified = 2, removed = 3}
```
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| .. | ||
| branch.lua | ||
| diagnostics.lua | ||
| diff.lua | ||
| encoding.lua | ||
| fileformat.lua | ||
| filename.lua | ||
| filetype.lua | ||
| location.lua | ||
| mode.lua | ||
| progress.lua | ||
| signify.lua | ||