Update json literal formatting

src/key/verification/start.rs

@@ -453,7 +453,8 @@ mod tests {
     #[test]
     fn deserialization_structure_mismatch() {
         // Missing several required fields.
-        let error = from_json_value::<EventJson<StartEventContent>>(json!({"from_device": "123"}))
+        let error =
+            from_json_value::<EventJson<StartEventContent>>(json!({ "from_device": "123" }))
                 .unwrap()
                 .deserialize()
                 .unwrap_err();