[plt-scheme] Re: [study-htdp] hello, reader expressions

Robby Findler wrote:
> The error message suggests that the author of the file edited the file
> in DrScheme and had the language set to a teaching language when they
> did so. DrScheme doesn't save teaching language files as plain text,
> but instead includes a header indicating what the language is and wha
>   
> teachpacks are installed.
>   
Even in text mode?

/Jens Axel