From Wade Anderson (@waderyan) on September 16, 2016 20:28

From LongQue on September 16, 2016 9:38

• VSCode Version:1.5.2
• OS Version:Windows 10
• Language:Typescript

"in" in the next picture is highlighted, but it's unnecessary.
I have found a few bugs about highlight, so I think maybe there are or will be still other bugs about it.

Copied from original issue: microsoft/vscode#12136

Copied from original issue: microsoft/TypeScript#10956