style: fix linting issues met Prettier

backend/src/services/assignments.ts

@@ -103,7 +103,6 @@ function hasDuplicates(arr: string[]): boolean {
 export async function putAssignment(classid: string, id: number, assignmentData: Partial<AssignmentDTO>): Promise<AssignmentDTO> {
     const assignment = await fetchAssignment(classid, id);
 
-
     if (assignmentData.groups) {
         if (hasDuplicates(assignmentData.groups.flat() as string[])) {
             throw new BadRequestException('Student can only be in one group');

frontend/src/views/assignments/TeacherAssignment.vue

@@ -149,7 +149,7 @@
                     const message = err.response?.data?.error || err.message || t("unknownError");
                     showSnackbar(t("failed") + ": " + message, "error");
                 },
-            }
+            },
         );
     }