[webapi][XWALK-2253] Update html code format

Impacted TCs num(approved): New 0, Update 7, Delete 0
Unit test Platform: Andriod
Andriod test result summary: Pass 6, Fail 1, Blocked 0
Merge pull request #673 from JianfengXu/xujf/webapi/2253

[webapi][XWALK-2253] Update html code format