Django admin实现TextField字段changelist页面换行、空格正常显示

<textarea name="lang_content" cols="40" rows="10" class="vLargeTextField" required="" id="id_lang_content">{
  "en": "this is a content",
  "zh-hant": "這是默認正文內容"
}</textarea>

<td class="field-lang_content">{
  "en": "this is a content",
  "zh-hant": "這是默認正文內容"
}</td>

CREATE TABLE `test_table` (
  `id` bigint(11) unsigned NOT NULL AUTO_INCREMENT COMMENT '自增主键',
  `title` varchar(255) NOT NULL DEFAULT '0',
  `content` varchar(255) NOT NULL,
  `lang_content` text NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4

# coding=utf-8
from django.db import models


class TestRecord(models.Model):
    class Meta:
        db_table = "test_record"
        db_tablespace = 'test_db'

    id = models.AutoField(primary_key=True, verbose_name="id")
    title = models.CharField(max_length=255)
    content = models.CharField(max_length=255)
    lang_content = models.TextField()

from django.contrib import admin
from django.utils.html import format_html

from .models import TestRecord


@admin.register(TestRecord)
class TestRecordAdmin(admin.ModelAdmin):
    list_display = ('id', 'title', 'content', 'lang_content', 'lang_content_view')

 list_editable = ('lang_content', )

    def lang_content_view(self, obj):
        # return format_html('<textarea cols=40 rows={} readonly>{}</textarea>', obj.lang_content.count('\n')+1, obj.lang_content)
        return format_html('<pre>{}</pre>', obj.lang_content)

<td class="field-lang_content_view"><pre>{
  "en": "this is a content",
  "zh-hant": "這是默認正文內容"
}</pre></td>