style: fix linting issues met ESLint

backend/src/routes/group.ts

@@ -1,7 +1,7 @@
 import express from 'express'
 const router = express.Router();
 
-// root endpoint used to search objects
+// Root endpoint used to search objects
 router.get('/', (req, res) => {
     res.json({
         groups: [
@@ -11,20 +11,20 @@ router.get('/', (req, res) => {
     });
 });
 
-// information about a group (members, ... [TODO DOC])
+// Information about a group (members, ... [TODO DOC])
 router.get('/:id', (req, res) => {
     res.json({
         id: req.params.id,
         assignment: '0',
         students: [ '0' ],
         submissions: [ '0' ],
-        // reference to other endpoint
-        // should be less hardcoded
+        // Reference to other endpoint
+        // Should be less hardcoded
         questions: `/group/${req.params.id}/question`, 
     });
 })
 
-// the list of questions a group has made
+// The list of questions a group has made
 router.get('/:id/question', (req, res) => {
     res.json({
         questions: [ '0' ],