help :: [([String], CmdArg, String)]
help = (["<expr>"], NoArg, "Evaluate an expression") :
  [ (map (':' :) names, args, text) | (names, args, text, _) <- parserCommandsForHelp ]
help :: [([String], CmdArg, String)]
help = (["<expr>"], NoArg, "Evaluate an expression") :
  [ (map (':' :) names, args, text) | (names, args, text, _) <- parserCommandsForHelp ]
help = (["<expr>"], NoArg, "Evaluate an expression") :
  [ (map (':' :) names, args, text) | (names, args, text, _) <- parserCommandsForHelp ]