cmd/vet: little tweak to tagged literal script to get it closer to drop-in format.
cmd/vet: little tweak to tagged literal script to get it closer to drop-in format.

This is a minor change that made it easier for me; if you hate it I can drop it.

R=nigeltao
CC=golang-dev
http://codereview.appspot.com/5798060

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