Fix bug that prevented the gofmt test script being run on more than one explicitly named file.
Fix bug that prevented the gofmt test script being run on more
than one explicitly named file.

R=rsc, gri
CC=golang-dev
http://codereview.appspot.com/186095

Committer: Robert Griesemer <a6752097faebf1f02d80107d77a9be009089afe3@golang.org>

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