The key "" is not recognized and ignored

环境：win7 64位，chrome 44.0.2403.125

打开一网页，chrome控制台报警告:The key "" is not recognized and ignored

html代码：

<meta name="viewport" content="width=1024, height=768,initial-scale=1.0,maximum-scale=1.0,user-scalable=0 " />

原因:meta有多余空格

修改：

<meta name="viewport" content="width=1024, height=768,initial-scale=1.0,maximum-scale=1.0,user-scalable=0" />

参考：https://github.com/picoCTF/picoCTF-Platform-1/pull/7