See https://groups.google.com/d/msg/Golang-nuts/AoVxQ4bB5XQ/i8kpMxdbVlEJ R=hanwen CC=golang-codereviews https://golang.org/cl/86190043
gofmt got better at removing trailing whitespace. R=golang-dev, rsc CC=golang-dev https://golang.org/cl/6929044
R=agl, gustav.paul, kardianos CC=golang-dev https://golang.org/cl/6207051