doc/articles/go_command: remove an extra word.

R=golang-dev, bradfitz
CC=golang-dev
https://codereview.appspot.com/7061051

Committer: Brad Fitzpatrick <bradfitz@golang.org>
all: use io.ByteWriter now that it exists

R=golang-dev, minux.ma
CC=golang-dev
https://codereview.appspot.com/7079043
go/types: "inherit" type in constant declarations w/o initialization expressions (bug fix)

R=adonovan
CC=golang-dev
https://codereview.appspot.com/7060054