Changed code style as to not to disable any eslint rules

spec/javascripts/lib/utils/common_utils_spec.js

-/* eslint-disable arrow-body-style*/
 require('~/lib/utils/common_utils');
 
 (() => {
@@ -168,13 +167,13 @@ require('~/lib/utils/common_utils');
     describe('gl.utils.backOff', () => {
       it('solves the promise from the callback', (done) => {
         const expectedResponseValue = 'Success!';
-        gl.utils.backOff((next, stop) => {
-          return new Promise((resolve) => {
+        gl.utils.backOff((next, stop) => (
+          new Promise((resolve) => {
             resolve(expectedResponseValue);
           }).then((resp) => {
             stop(resp);
-          });
-        }).then((respBackoff) => {
+          })
+        )).then((respBackoff) => {
           expect(respBackoff).toBe(expectedResponseValue);
           done();
         });
@@ -183,7 +182,7 @@ require('~/lib/utils/common_utils');
       it('catches the rejected promise from the callback ', (done) => {
         const errorMessage = 'Mistakes were made!';
         gl.utils.backOff((next, stop) => {
-          return new Promise((resolve, reject) => {
+          new Promise((resolve, reject) => {
             reject(new Error(errorMessage));
           }).then((resp) => {
             stop(resp);
@@ -198,8 +197,8 @@ require('~/lib/utils/common_utils');
       it('solves the promise correctly after retrying a third time', (done) => {
         let numberOfCalls = 1;
         const expectedResponseValue = 'Success!';
-        gl.utils.backOff((next, stop) => {
-          return new Promise((resolve) => {
+        gl.utils.backOff((next, stop) => (
+          new Promise((resolve) => {
             resolve(expectedResponseValue);
           }).then((resp) => {
             if (numberOfCalls < 3) {
@@ -208,8 +207,8 @@ require('~/lib/utils/common_utils');
             } else {
               stop(resp);
             }
-          });
-        }).then((respBackoff) => {
+          })
+        )).then((respBackoff) => {
           expect(respBackoff).toBe(expectedResponseValue);
           expect(numberOfCalls).toBe(3);
           done();
@@ -218,13 +217,13 @@ require('~/lib/utils/common_utils');
 
       it('rejects the backOff promise after timing out', (done) => {
         const expectedResponseValue = 'Success!';
-        gl.utils.backOff((next) => {
-          return new Promise((resolve) => {
+        gl.utils.backOff(next => (
+          new Promise((resolve) => {
             resolve(expectedResponseValue);
           }).then(() => {
             setTimeout(next(), 5000); // it will time out
-          });
-        }, 3000).catch((errBackoffResp) => {
+          })
+        ), 3000).catch((errBackoffResp) => {
           expect(errBackoffResp instanceof Error).toBe(true);
           expect(errBackoffResp.message).toBe('BACKOFF_TIMEOUT');
           done();