Because the document contains <section> elements, it is confusing the differ. We should just diff the contents of the <section>.
- In this example I start by section-editing "Section 2" (use mobile site to ensure real section editing: https://en.m.wikipedia.beta.wmflabs.org/wiki/Lazarus_and_Joannes_Baptista_Colloredo#/editor/2)
- I change some text in the sub-section paragraph.
- I expect to see the heading above and below in grey as context, and no more information
- Instead I see the whole section ("Section 2") in black, with content above and below that in grey as context: