[case]添加ua.checkSameNode
Merge branch 'dev-1.2.6' of https://github.com/campaign/ueditor into dev-1.2.6
[case] 修改用例：代码结尾加换行
[case]checkSameHtml
Merge branch 'dev-1.2.6' of https://github.com/campaign/ueditor into dev-1.2.6