User-reported unhelpful error message

[codeworld-feedback]

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Program: https://code.world/haskell#PiQS_Lg8RSMk5ZgZfsD87jg

Comment:

Can error messages include how to fix instructions?

Message:

program.hs:1:23: error:
    parse error on input ‘$’
    Perhaps you intended to use TemplateHaskell