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It might come in handy on April Fool’s day. Apparently, there is the Greek question mark – U037E, which looks like a semicolon (;). When your teammate turns away, change any semicolon in their code to this character. Sit back and enjoy their reaction 🙂 Everything will seem fine, but the code will not compile. (C) The "60 terrible tips for a C developer" book Unicode Character";" (U037E) a