go spec: correct clarification of type declaration
go spec: correct clarification of type declaration

R=rsc, r
CC=golang-dev
http://codereview.appspot.com/855043

Committer: Robert Griesemer <a6752097faebf1f02d80107d77a9be009089afe3@golang.org>

tav/go,tav/go,tav/go,tav/go,tav/go,tav/go,tav/go