Update ReactBrowserEventEmitter-test.internal.js

Author: AlfredoGJ

packages/react-dom/src/__tests__/ReactBrowserEventEmitter-test.internal.js

@@ -89,7 +89,7 @@ describe('ReactBrowserEventEmitter', () => {
         <div ref={c => (GRANDPARENT = c)} {...GRANDPARENT_PROPS}>
           <div ref={c => (PARENT = c)} {...PARENT_PROPS}>
             <ChildWrapper {...CHILD_PROPS} />
-            <button disabled ref={ c => (BUTTON = c)} {...BUTTON_PROPS}></button>
+            <button disabled ref={c => (BUTTON = c)} {...BUTTON_PROPS}></button>
           </div>
         </div>,
         container,