Implement 'withoutEscapingSlashes' option and clean up string writing#1885

kperryua merged 1 commit intoswiftlang:experimental/new-codableswiftlang/swift-foundation:experimental/new-codablefrom

kperryua:new-codable/non-escaping-slasheskperryua/swift-foundation:new-codable/non-escaping-slashesCopy head branch name to clipboard