Problem about format marks

When I type in the text editor of Visual Studio(C++) IDE, everytime I press space, or a tab, there is a dot or an arrow marking it. I cannot figure out what I turned on or how to get this off. Could anyone tell me how to turn it off Thanks!

Visual C++16

I would recommend this answer: http://forums.microsoft.com/MSDN/ShowPost.aspx PostID=1095029&SiteID=1.