fixed karma specs with change in icon name

spec/javascripts/ide/components/changed_file_icon_spec.js

@@ -28,7 +28,7 @@ describe('IDE changed file icon', () => {
     it('equals file-addition when a temp file', () => {
       vm.file.tempFile = true;
 
-      expect(vm.changedIcon).toBe('file-addition');
+      expect(vm.changedIcon).toBe('file-additions');
     });
   });
 

spec/javascripts/ide/components/commit_sidebar/list_item_spec.js

@@ -73,7 +73,7 @@ describe('Multi-file editor commit sidebar list item', () => {
       it('returns addition when not a tempFile', () => {
         f.tempFile = true;
 
-        expect(vm.iconName).toBe('file-addition');
+        expect(vm.iconName).toBe('file-additions');
       });
     });