*: fix gofmt style issues in 'range'

db_test.go

@@ -1587,7 +1587,7 @@ func mustContainKeys(b *bolt.Bucket, m map[string]string) {
 
 	// Check for keys found in bucket that shouldn't be there.
 	var keys []string
-	for k, _ := range found {
+	for k := range found {
 		if _, ok := m[string(k)]; !ok {
 			keys = append(keys, k)
 		}
@@ -1598,7 +1598,7 @@ func mustContainKeys(b *bolt.Bucket, m map[string]string) {
 	}
 
 	// Check for keys not found in bucket that should be there.
-	for k, _ := range m {
+	for k := range m {
 		if _, ok := found[string(k)]; !ok {
 			keys = append(keys, k)
 		}

freelist.go

@@ -6,7 +6,6 @@ import (
 	"unsafe"
 )
 
-
 // txPending holds a list of pgids and corresponding allocation txns
 // that are pending to be freed.
 type txPending struct {