diffConfig always returns true if modeBarButtons (array of array) is populated

diffConfig function has bug where it always returns true if modeBarButtons (array of array) is populated. This results in unnecessary re-rendering. The function should check if the array member is array inside a for loop, It should be -

/*

• simple diff for config - for now, just treat all changes as equivalent
  */
  function diffConfig(oldConfig, newConfig) {
  var key;

  for(key in oldConfig) {
  if(key.charAt(0) === '_') continue;
  var oldVal = oldConfig[key];
  var newVal = newConfig[key];
  if(oldVal !== newVal) {
  if(Lib.isPlainObject(oldVal) && Lib.isPlainObject(newVal)) {
  if(diffConfig(oldVal, newVal)) {
  return true;
  }
  } else if(Array.isArray(oldVal) && Array.isArray(newVal)) {
  if(oldVal.length !== newVal.length) {
  return true;
  }

           for(var i = 0; i < oldVal.length; i++) {
               if(oldVal[i] !== newVal[i]) {
   				**if(Array.isArray(oldVal[i]) && Array.isArray(newVal[i])){
   					if(diffConfig(oldVal[i], newVal[i])) {
   						return true;
   					}
   				}							
                   else** if(Lib.isPlainObject(oldVal[i]) && Lib.isPlainObject(newVal[i])) {
                       if(diffConfig(oldVal[i], newVal[i])) {
                           return true;
                       }
                   } else {
                       return true;
                   }
               }
           }
       } else {
           return true;
       }
   }
  

  }
  }

e.g Config object used -

const plotlyConfig: Partial = {
responsive: true,
displaylogo: false,
displayModeBar: true,
doubleClick: false,
showTips: false,
scrollZoom: false,
modeBarButtons: [
[
'select2d',
'lasso2d',
'zoom2d',
'pan2d',
'resetScale2d',
],
],
locale: language,
locales: locales
}

定位 diffConfig 函数，并使用包含嵌套 modeBarButtons 数组的 plotlyConfig 示例作为复现案例。比较等价的嵌套数组，并验证未更改的配置不会被报告为不同，从而避免不必要的重新渲染；该 issue 未指定文件或测试。