# Pastebin NJna5ksS
> (require racket/rerequire)
> (dynamic-rerequire "x.rkt")
'(#<path:/home/samth/tmp/x.rkt>)
> (require "x.rkt")
> (f 1)
11
> ; edit x.rkt here
1
1
> (dynamic-rerequire "x.rkt")
  [re-loading /home/samth/tmp/x.rkt]
'(#<path:/home/samth/tmp/x.rkt>)
> (f 1)
13
>