代码缩进bug【在缩进格式为4个空格的情况下，按下ctrl+s会自动变成2个空格】

示例代码：

  <div class="app">  
      <van-form @submit="onSubmit">  
        <van-field  
            v-model="dataForm.companyName"  
            name="公司全称"  
            label="公司全称"  
            placeholder="公司全称"  
            :rules="[{ required: true, message: '请填写公司全称' }]"  
        />  
        <van-field  
            v-model="dataForm.userName"  
            name="用户姓名"  
            label="用户姓名"  
            placeholder="用户姓名"  
            :rules="[{ required: true, message: '请填写用户姓名' }]"  
        />  
        <van-field  
            v-model="dataForm.phone"  
            name="联系电话"  
            label="联系电话"  
            placeholder="联系电话"  
            type="tel"  
            maxlength="11"  
            :rules="[{ required: true,  message: '请填写联系电话' },{pattern: checkPhone , message: '联系电话格式错误'}]"  
        />  

        <van-field  
            v-model="dataForm.email"  
            name="邮箱"  
            label="邮箱"  
            placeholder="邮箱"  
            :rules="[{ required: true,  message: '请填写邮箱' },{pattern: checkEmail , message: '邮箱格式错误'}]"  
        />  

        <van-field  
            v-model="dataForm.address"  
            name="详细地址"  
            label="详细地址"  
            placeholder="详细地址"  
            :rules="[{ required: true,  message: '请填写详细地址' }]"  
        />  

        <div style="margin: 16px;">  
            <van-button round block type="info" native-type="submit">  
                保存修改  
            </van-button>  
        </div>  
      </van-form>  
  </div>  
</template>  

<script>  
export default {  
    data(){  
        return{  
            dataForm:{  
                userName: "",  

            },  
            checkPhone: /^1[3456789]\d{9}$/ ,  
            checkEmail: /^[a-zA-Z0-9_-]+@[a-zA-Z0-9_-]+(\.[a-zA-Z0-9_-]+)+$/  
        }  
    },  
    methods:{  
        /**  
         * 提交表单  
         */  
        onSubmit(values) {  
            console.log('submit', values);  
        },  
    }  
}  
</script>  

<style scoped>  
.app{  
    color: #FFFFFF;  
    font-size: 0.2rem;  
}  

</style>

操作步骤：

随便修改代码ctrl+s 保存即可

预期结果：

缩进应该是4个空格不变

实际结果：

Ctrl+s之后缩进变成2个空格