dotfiles/powerline/config/themes/vim/plugin_gundo-preview.json

{
	"segments": {
		"left": [
			{
				"type": "string",
				"highlight_groups": ["gundo:name", "file_name"],
				"contents": "Undo diff"
			},
			{
				"type": "string",
				"highlight_groups": ["gundo:background", "background"],
				"draw_soft_divider": false,
				"draw_hard_divider": false,
				"width": "auto"
			}
		]
	}
}