Fix sanitizing HTML in Safari 7
Fix sanitizing HTML in Safari 7

ChenMichael/trix,GabiGrin/trix,basecamp/trix,GabiGrin/trix,urossmolnik/trix,ChenMichael/trix,basecamp/trix,ChenMichael/trix,basecamp/trix,urossmolnik/trix,basecamp/trix,GabiGrin/trix,urossmolnik/trix