test: fix gofmt format
test: fix gofmt format

My IDE is fixing this for me every time I touch anything.
Might as well submit to shut it up.

Change-Id: If88c8357609049b32695c3cfe611166664409835
Reviewed-on: https://upspin-review.googlesource.com/7525
Reviewed-by: Andrew Gerrand <395a7d33bec8475c9b83b7d440f141bcbd994aa5@google.com>
Reviewed-by: David Presotto <516b9783fca517eecbd1d064da2d165310b19759@google.com>

upspin/upspin,upspin/upspin