Do pending `go fmt` updates.

I'm collecting these changes, made by `go fmt` into their own change so
that they don't add noise to a meaningful change in the future.

Change-Id: I0ca931816fdba60ecde43e3eaffd0339d1773e73
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/52429
Reviewed-by: Bob Beck <bbe@google.com>

util/fipstools/acvp/acvptool/acvp.go

diff --git a/util/fipstools/acvp/acvptool/acvp.go b/util/fipstools/acvp/acvptool/acvp.go
index f477d65..4c7e07c 100644
--- a/util/fipstools/acvp/acvptool/acvp.go
+++ b/util/fipstools/acvp/acvptool/acvp.go
@@ -185,7 +185,7 @@
 // it's a header.
 func looksLikeHeaderElement(element json.RawMessage) bool {
 	var headerFields struct {
-		URL string `json:"url"`
+		URL       string `json:"url"`
 		Algorithm string `json:"algorithm"`
 	}
 	if err := json.Unmarshal(element, &headerFields); err != nil {

util/fipstools/acvp/acvptool/interactive.go

diff --git a/util/fipstools/acvp/acvptool/interactive.go b/util/fipstools/acvp/acvptool/interactive.go
index b13a549..ee992f1 100644
--- a/util/fipstools/acvp/acvptool/interactive.go
+++ b/util/fipstools/acvp/acvptool/interactive.go
@@ -12,6 +12,7 @@
 // OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 // CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
+//go:build interactive
 // +build interactive
 
 package main

util/fipstools/acvp/acvptool/nointeractive.go

diff --git a/util/fipstools/acvp/acvptool/nointeractive.go b/util/fipstools/acvp/acvptool/nointeractive.go
index 06c8890..8aa0839 100644
--- a/util/fipstools/acvp/acvptool/nointeractive.go
+++ b/util/fipstools/acvp/acvptool/nointeractive.go
@@ -12,6 +12,7 @@
 // OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 // CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
+//go:build !interactive
 // +build !interactive
 
 package main