doc: remove file.go from run (fix windows build)
doc: remove file.go from run (fix windows build)

R=golang-dev, r, alex.brainman, r
CC=golang-dev
http://codereview.appspot.com/5479069

h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang