message: alive-tv: update --passes description
diff: @@ -62,7 +62,9 @@ llvm::cl::opt<std::string> opt_tgt_fn(LLVM_ARGS_PREFIX"tgt-fn",
  llvm::cl::opt<string>
  optPass(LLVM_ARGS_PREFIX "passes",
  llvm::cl::value_desc("optimization passes"),
  - llvm::cl::desc("a parameter to specify optimization passes, separated by comma"),
  + llvm::cl::desc("Specify which LLVM passes to run (default=O2). "
  + "The syntax is described at "
  + "https://llvm.org/docs/NewPassManager.html#invoking-opt"),
  llvm::cl::cat(alive_cmdargs), llvm::cl::init("O2"));
  