test for copy()
test for copy()

R=rsc, ken2
CC=golang-dev
http://codereview.appspot.com/156084

h8liu/golang,dsriram/golang,tianon/debian-golang,pombredanne/go-deleteme,apparentlymart/golang,nightlyone/golang,nightlyone/golang,bdwalton/debian-golang,apparentlymart/golang,bdwalton/debian-golang,nightlyone/golang,apparentlymart/golang,dsriram/golang,h8liu/golang,tianon/debian-golang,tv42/old-go,gnanderson/go,pombredanne/go-deleteme,pombredanne/go-deleteme,dsriram/golang,tianon/debian-golang,tianon/debian-golang,ssrl/go,pombredanne/go-deleteme,dsriram/golang,ssrl/go,nightlyone/golang,h8liu/golang,apparentlymart/golang,bdwalton/debian-golang,gnanderson/go,bdwalton/debian-golang,tv42/old-go,ssrl/go,h8liu/golang,pombredanne/go-deleteme,dsriram/golang,bdwalton/debian-golang,h8liu/golang,tianon/debian-golang,nightlyone/golang,tv42/old-go,pombredanne/go-deleteme,apparentlymart/golang,dsriram/golang,tv42/old-go,h8liu/golang,h8liu/golang,ssrl/go,pombredanne/go-deleteme,gnanderson/go,gnanderson/go,gnanderson/go,gnanderson/go,tianon/debian-golang,bdwalton/debian-golang,ssrl/go,dsriram/golang,tv42/old-go,apparentlymart/golang,bdwalton/debian-golang,tianon/debian-golang,ssrl/go,gnanderson/go,tianon/debian-golang,nightlyone/golang,tv42/old-go,tv42/old-go,apparentlymart/golang,bdwalton/debian-golang,nightlyone/golang,ssrl/go