Unescape a string after it's been received by a bot
Unescape a string after it's been received by a botBots depend on rigidly defined return codes. However, since return codes consist of easily used ASCII characters, it's necessary to escape arbitrary user-provided strings. This function reverses this process, yielding the original, unescaped string. It's meant to be used by bots that have received a prompt string from the system.