When viewing a commit diff, a file toggle button is added to each file header.

Click on the toggle button to either collapse or expand that file block:

In "enabled" mode, using Shift + Click will collapse or expand all file blocks to match the last clicked on toggle button.

An "accordion" mode was added which makes the toggles behave like an accordion.

• When the page is initially open, the top-most file block will stay open while all other blocks will collapse.
• When a collapsed block toggle is clicked, the file will expand and all other blocks will collapse.
• All blocks can still be collapsed, but using Shift + click won't do anything.

This code is integrated into the GitHub Dark Script; it is available here separately. There is no need to install both.