Line plot with several groups broke

[za3k]

In https://d3-graph-gallery.com/graph/line_several_group.html

"d3.nest" no longer exists. This should be re-written to use d3.group.

P.S. note at the bottom says "fill a bug" instead of "file a bug"

[za3k]

Specifically I'm using d3 v7 and it broke