fmt: update an old comment; fix a typo.
fmt: update an old comment; fix a typo.

R=golang-dev, iant
CC=golang-dev, minux.ma
https://codereview.appspot.com/6998055

Committer: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@golang.org>

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