src/vs/workbench/common/editor/diffEditorInput.ts/DiffEditorInput/getDescription
class DiffEditorInput:	override getDescription(verbosity = Verbosity.MEDIUM): string | undefined {
		if (typeof this.description !== 'string') {

			// Pass the description of the modified side in case both original
			// and modified input have the same parent and we compare file resources.
			const fileResources = this.asFileResources();
			if (fileResources && dirname(fileResources.original).path === dirname(fileResources.modified).path) {
				return this.modifiedInput.getDescription(verbosity);
			}
		}

		return this.description;
	}