strings: fix test output
strings: fix test output

R=rsc, gri
CC=golang-dev
http://codereview.appspot.com/5445044

Committer: Robert Griesemer <a6752097faebf1f02d80107d77a9be009089afe3@golang.org>

apparentlymart/golang,gnanderson/go,tv42/old-go,tv42/old-go,tv42/old-go,apparentlymart/golang,dsriram/golang,dsriram/golang,pombredanne/go-deleteme,pombredanne/go-deleteme,gnanderson/go,gnanderson/go,pombredanne/go-deleteme,pombredanne/go-deleteme,apparentlymart/golang,apparentlymart/golang,gnanderson/go,gnanderson/go,dsriram/golang,gnanderson/go,dsriram/golang,dsriram/golang,apparentlymart/golang,gnanderson/go,apparentlymart/golang,apparentlymart/golang,dsriram/golang,tv42/old-go,tv42/old-go,pombredanne/go-deleteme,tv42/old-go,pombredanne/go-deleteme,tv42/old-go,dsriram/golang,pombredanne/go-deleteme