Apply suggestions from code review

Co-authored-by: Benjamin Wang <[email protected]>

etcdutl/etcdutl/printer.go

@@ -82,7 +82,7 @@ func makeDBStatusTable(ds snapshot.Status) (hdr []string, rows [][]string) {
 func makeDBHashKVTable(ds snapshot.HashKV) (hdr []string, rows [][]string) {
 	hdr = []string{"hash", "hash revision", "compact revision"}
 	rows = append(rows, []string{
-		fmt.Sprintf("%x", ds.Hash),
+		fmt.Sprint(ds.Hash),
 		fmt.Sprint(ds.HashRevision),
 		fmt.Sprint(ds.CompactRevision),
 	})

etcdutl/etcdutl/snapshot_command.go

@@ -72,12 +72,10 @@ func newSnapshotHashKVCommand() *cobra.Command {
 	cmd := &cobra.Command{
 		Use:   "hashkv <filename>",
 		Short: "Prints the KV history hash of a given file",
-		Long: `When --write-out is set to simple, this command prints out comma-separated status lists for each endpoint.
-The items in the lists are hash, hash revision, compact revision.
 `,
-		Run: SnapshotHashKVCommandFunc,
+		Run: snapshotHashKVCommandFunc,
 	}
-	cmd.Flags().Int64Var(&hashKVRevision, "rev", 0, "maximum revision to hash (default: all revisions)")
+	cmd.Flags().Int64Var(&hashKVRevision, "rev", 0, "maximum revision to hash (default: latest revision)")
 	return cmd
 }