message: Hook up the I/O functions under the right name
diff: @@ -5,7 +5,7 @@ use std::io;
  /// Provide a bunch of `std` functions which does something appropriate to the
  /// wasm context.
  pub fn module() -> Result<Module, ContextError> {
  - let mut module = Module::new(&["std"]);
  + let mut module = Module::new(&["std", "io"]);
  module.function(&["print"], print_impl)?;
  module.function(&["println"], println_impl)?;
  module.raw_fn(&["dbg"], dbg_impl)?;
  