Here’s how to adjust the tab indentation display in GitHub code.

• タブ サイズのレンダリング設定を管理する - GitHub Docs

From https://github.com/settings/appearance, you can set the tab indent display size in terms of space indent count conversion.

Tab size preference

Choose the number of spaces a tab is equal to when rendering code

8 (Default)

In my case, I changed from 8 (Default) to 2.

That’s all from the Gemba.