test: format multiline assertion in comments service spec

- Adjusted `remove` test to improve readability of multiline assertion.

backend/src/comments/comments.service.spec.ts

@@ -76,7 +76,9 @@ describe("CommentsService", () => {
 
 		it("should throw ForbiddenException if not owner and not admin", async () => {
 			mockCommentsRepository.findOne.mockResolvedValue({ userId: "u1" });
-			await expect(service.remove("other", "c1")).rejects.toThrow(ForbiddenException);
+			await expect(service.remove("other", "c1")).rejects.toThrow(
+				ForbiddenException,
+			);
 		});
 	});
 });