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MathJax breaks in edit history
I noticed this in a post on Code Golf Codidact where MathJax is enabled.
The raw text of the post can be seen by pressing "Edit" or "Suggest edit" below the post:
When viewing the edit history, most of the MathJax is rendered, rather than showing the raw text. However, a MathJax term that is partly edited shows as a mixture of rendered and raw text:
This appears to be happening when the added or removed section of the edit separates the part of the text with the opening $ from the part of the text with the closing $. In the right hand green section in the screenshot above, there is an opening $ that is ignored by the renderer because its corresponding closing $ is inside the added section. That corresponding closing $ is then treated as an opening $, resulting in "withthefirst" being rendered as MathJax (it is between the closing $ of the MathJax term before, and the opening $ of the next MathJax term, and they are being treated as the opening and closing $ signs of a single MathJax term).
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