Bad label positioning in pie-charts

Depending on the number of categories and the amount of text in labels, the positioning of labels in pie-charts might be unsatisfying. The labels might overlap the title/subtitle. Here is an example image showing the problem:

This codepen contains relevant code for reproducing the issue.

There is also a related issue, which suggests adding an optional space between title and plot. But as this space would definitively depend on the actual data, I'd say plotly should handle this for the user automatically.

リンクされているCodePenの再現例から始め、関連するissue #4932と比較します。カテゴリ数とラベルの長さを変えた場合の円グラフのラベルレイアウトの挙動を追跡し、そのうえで、ラベルがタイトルやサブタイトルと重ならなくなっていることを、読みやすい配置を維持しながら確認します。