Since the article's title doesn't have that weakness and should have been used anyhow, we'll use it. (Submitted title was "Anguish: A language written in zero-width characters".)
Anyone who uses 'lede' correctly gets express treatment here...
I chose that title because "invisible" has a lot of meanings and "zero-width" is more precise here. Brainfuck is an invisible language -- and so is COBOL because so few people think about its widespread use today.
Anyone who uses 'lede' correctly gets express treatment here...