[bug report] El date picker format problem (format = "yyyy mm dd dd HH: mm") pop-up box displays the problem, and the day word appears in the tenth cell

[asdsadas]

Element UI version

2.15.7

OS/Browsers version

Windows10操作系统/谷歌浏览器

Vue version

2.6.14

Reproduction Link

https://codepen.io/pen/

Steps to reproduce

format和value-format 设置为 yyyy年MM月dd日HH:mm

What is Expected?

弹框一个单元格（日期）为xxxx年xx月xx日 第二个为XX:XX

What is actually happening?

弹框一个单元格（日期）为xxxx年xx月xx 第二个为日XX:XX

[element-bot]

Translation of this issue:

Element UI version

2.15.7

OS/Browsers version

Windows10 operating system / Google browser

Vue version

2.6.14

Reproduction Link

https://codepen.io/pen/

Steps to reproduce

Format and value format are set to yyyy MM DD HH: mm

What is Expected?

One cell (date) in the pop-up box is XX month XX, XXXX, and the second cell is XX: XX

What is actually happening?

In the pop-up box, one cell (date) is XXXX, and the second cell (date) is XX: XX

[asdsadas]

[asdsadas]

[ChengDale]

You used the wrong usage check out your code by https://element.eleme.io/#/zh-CN/component/date-picker

[yutaroman]

I'm having the same problem.

format="yyyy年MM月dd日 HH:mm"