Allow tabbing through tutorial steps#356

dobromir-hristov wants to merge 1 commit intoswiftlang:mainswiftlang/swift-docc-render:mainfrom

dobromir-hristov:dhristov/r50959680-add-tabbing-support-tutorialsdobromir-hristov/swift-docc-render:dhristov/r50959680-add-tabbing-support-tutorialsCopy head branch name to clipboard