refactor: address pr comments

Author: alenakhineika

packages/e2e-tests/test/e2e.spec.ts

@@ -737,13 +737,10 @@ describe('e2e', function () {
 
     it('throws the .toArray() suggestion when a user attempts to serialize a cursor', async function () {
       await shell.executeLine('const b = db.test.find()');
-      await shell.executeLine('b.b = b');
       await shell.executeLine('console.log(JSON.stringify(b));');
-      await eventually(() => {
-        shell.assertContainsOutput(
-          'Error serializing a cursor. Did you mean to call .toArray() first?'
-        );
-      });
+      shell.assertContainsOutput(
+        'Cannot serialize a cursor to JSON. Did you mean to call .toArray() first?'
+      );
     });
 
     it('expands explain output from aggregation indefinitely', async function () {

packages/shell-api/src/cursor.spec.ts

@@ -809,7 +809,7 @@ describe('Cursor', function () {
         } catch (e: any) {
           expect(e).to.be.instanceOf(MongoshInvalidInputError);
           expect(e.message).to.contain(
-            'Error serializing a cursor. Did you mean to call .toArray() first?'
+            'Cannot serialize a cursor to JSON. Did you mean to call .toArray() first?'
           );
           expect(e.code).to.equal(CommonErrors.InvalidArgument);
         }

packages/shell-api/src/cursor.ts

@@ -44,7 +44,7 @@ export default class Cursor extends AggregateOrFindCursor<ServiceProviderFindCur
    */
   toJSON(): void {
     throw new MongoshInvalidInputError(
-      'Error serializing a cursor. Did you mean to call .toArray() first?',
+      'Cannot serialize a cursor to JSON. Did you mean to call .toArray() first?',
       CommonErrors.InvalidArgument
     );
   }