[plt-scheme] dynamic-require error message

[request follows]

Hello all,

In case dynamic-require is passed a symbol which is not provided by
the module the exn:fail:contract is raised (from the docs). However,
nothing is said when the path to the file doesn't exist.
If I try that I get an error from open-input-file.
It would be nicer to have the error mention dynamic-require and if
possible, have an exception thrown.

Cheers,

-- 
Paulo Jorge Matos - pocm at soton.ac.uk
http://www.personal.soton.ac.uk/pocm
PhD Student @ ECS
University of Southampton, UK