[racket] enter! on a .ss file

Hello,

I've getting along fine with PLT Scheme (now Racket) and had decided
to switch to an Emacs/Quack setup.   I discovered the interactive
module loading feature of "enter!" is perfect for REPL style
interactions and wanted to use it.

I discovered though that enter! has some odd-ish behaviour in relation
to my old-style .ss files.

1) Loading a .ss file with enter! is fine but reloading fails silently
2) When both a .rkt and a .ss file exist enter! will load the .ss file
and ignore the .rkt file

Now I admit that these are PEBCAK style but they both had me
scratching my head for a while ...

Steve