[racket] Documentation enhancement suggestions

On Wed, Jan 4, 2012 at 11:22 AM, Vincent St-Amour <stamourv at ccs.neu.edu> wrote:
> When the cursor is inside a function call and the operator is
> recognized by eldoc (both standard library functions and user-defined
> functions defined in the same file), the function's header and (if
> known) return type is displayed in the minibuffer.
>

Geiser gives some info based on cursor position.