os/exec: remove unnecessary fmt.Sprintf call
Change-Id: Ic0ac97a15dadd756d727fd8abe23359b0347af19
GitHub-Last-Rev:
a96a3f5fe7fbfb41f38acadab3c03c4a76c89b78
GitHub-Pull-Request: golang/go#66052
Reviewed-on: https://go-review.googlesource.com/c/go/+/568317
Reviewed-by: Bryan Mills <bcmills@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Jorropo <jorropo.pgm@gmail.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>