Address MR comments.

app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_nothing_to_merge.js

@@ -32,7 +32,6 @@ export default {
           <a
             v-if="mr.newBlobPath"
             :href="mr.newBlobPath"
-            role="button"
             class="btn btn-inverted btn-save">
             Create file
           </a>

spec/javascripts/vue_mr_widget/components/states/mr_widget_nothing_to_merge_spec.js

@@ -15,7 +15,7 @@ describe('MRWidgetNothingToMerge', () => {
     it('should have correct elements', () => {
       expect(vm.$el.classList.contains('mr-widget-body')).toBeTruthy();
       expect(vm.$el.querySelector('a').href).toContain(newBlobPath);
-      expect(vm.$el.innerText).toContain("Currently there are no changes in this merge request's source branch");
+      expect(vm.$el.innerText).toContain('Currently there are no changes in this merge request\'s source branch');
       expect(vm.$el.innerText).toContain('Please push new commits or use a different branch.');
     });