style: fix linting issues met Prettier

backend/src/entities/assignments/assignment.entity.ts

@@ -12,7 +12,12 @@ import { Language } from '../content/language.js';
 
 @Entity()
 export class Assignment {
-    @ManyToOne({ entity: () => {return Class}, primary: true })
+    @ManyToOne({
+        entity: () => {
+            return Class;
+        },
+        primary: true,
+    })
     within!: Class;
 
     @PrimaryKey({ type: 'number' })
@@ -27,9 +32,18 @@ export class Assignment {
     @Property({ type: 'string' })
     learningPathHruid!: string;
 
-    @Enum({ items: () => {return Language} })
+    @Enum({
+        items: () => {
+            return Language;
+        },
+    })
     learningPathLanguage!: Language;
 
-    @OneToMany({ entity: () => {return Group}, mappedBy: 'assignment' })
+    @OneToMany({
+        entity: () => {
+            return Group;
+        },
+        mappedBy: 'assignment',
+    })
     groups!: Group[];
 }

backend/src/entities/assignments/group.entity.ts

@@ -4,12 +4,21 @@ import { Student } from '../users/student.entity.js';
 
 @Entity()
 export class Group {
-    @ManyToOne({ entity: () => {return Assignment}, primary: true })
+    @ManyToOne({
+        entity: () => {
+            return Assignment;
+        },
+        primary: true,
+    })
     assignment!: Assignment;
 
     @PrimaryKey({ type: 'integer' })
     groupNumber!: number;
 
-    @ManyToMany({ entity: () => {return Student} })
+    @ManyToMany({
+        entity: () => {
+            return Student;
+        },
+    })
     members!: Student[];
 }

backend/src/entities/assignments/submission.entity.ts

@@ -8,7 +8,12 @@ export class Submission {
     @PrimaryKey({ type: 'string' })
     learningObjectHruid!: string;
 
-    @Enum({ items: () => {return Language}, primary: true })
+    @Enum({
+        items: () => {
+            return Language;
+        },
+        primary: true,
+    })
     learningObjectLanguage!: Language;
 
     @PrimaryKey({ type: 'string' })
@@ -17,13 +22,22 @@ export class Submission {
     @PrimaryKey({ type: 'integer' })
     submissionNumber!: number;
 
-    @ManyToOne({ entity: () => {return Student} })
+    @ManyToOne({
+        entity: () => {
+            return Student;
+        },
+    })
     submitter!: Student;
 
     @Property({ type: 'datetime' })
     submissionTime!: Date;
 
-    @ManyToOne({ entity: () => {return Group}, nullable: true })
+    @ManyToOne({
+        entity: () => {
+            return Group;
+        },
+        nullable: true,
+    })
     onBehalfOf?: Group;
 
     @Property({ type: 'json' })