Can't revert change that deletes a single empty line in side-by-side diff editor

[Mingpan]

Does this issue occur when all extensions are disabled?: Yes

• VS Code Version: 1.69-insider
• OS Version: MacOS Monterey

Steps to Reproduce:

1. Having a side-by-side diff editor
2. Make a change that removes a single empty line
3. Try to revert the change with the arrow Arrows to revert changes in side by side diff editor #151826

Due to an inaccurate if check in revertChange method [1], the delete of an empty line is not correctly recognized (sorry about that!)

@hediet

[1]

vscode/src/vs/editor/browser/widget/diffEditorWidget.ts

Line 646 in 1bf95bc

} else if (change.modifiedEndLineNumber === 0 && originalContent) {

shoud be ... && originalContent != null) instead of just checking ... && originalContent)

[hediet]

Thanks! It would be awesome if we had some tests for this!