A userscript that allows you to add one or more vertical guidelines to the code
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Hi @aspiers! You're right, I've been meaning to make the css skip the non-code blocks. And you're right, having them inside the comments doesn't work especially when indenting is used. I'll also remove the fixed width definition. You can get use the toggle button from this script: https://greasyfork.org/en/scripts/18787-github-monospace-font-toggle.
Let me know what you think of the update!
not quite there yet
For me the vertical lines get broken up by having different indentation for different parts of the diff. They also appear in boxes for adding comments, which doesn't seem appropriate.