You'll notice
Useful3 Signal1
Notebook edit approvals now tell you why the cell preview is blank instead of showing nothing.
What's wrong with this entry?
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What
When a NotebookEdit approval cannot show the cell being changed, it now prints the reason inline instead of an empty diff: the notebook is too large for preview, the preview is unavailable, or the cell was not found. The message notes that approving still applies the edit to the real cell.
Evidence
notebook too large for preview
Strings lifted out of the shipped bundle, so the claim above can be checked against them.