log-backup: format the date displayed in --help (#36713)

close #36717

br/pkg/task/restore.go

@@ -171,9 +171,9 @@ func DefineRestoreFlags(flags *pflag.FlagSet) {
 // DefineStreamRestoreFlags defines for the restore log command.
 func DefineStreamRestoreFlags(command *cobra.Command) {
 	command.Flags().String(FlagStreamStartTS, "", "the start timestamp which log restore from.\n"+
-		"support TSO or datetime, e.g. '400036290571534337' or '2018-05-11 01:42:23'")
+		"support TSO or datetime, e.g. '400036290571534337' or '2018-05-11 01:42:23+0800'")
 	command.Flags().String(FlagStreamRestoreTS, "", "the point of restore, used for log restore.\n"+
-		"support TSO or datetime, e.g. '400036290571534337' or '2018-05-11 01:42:23'")
+		"support TSO or datetime, e.g. '400036290571534337' or '2018-05-11 01:42:23+0800'")
 	command.Flags().String(FlagStreamFullBackupStorage, "", "specify the backup full storage. "+
 		"fill it if want restore full backup before restore log.")
 }

br/pkg/task/stream.go

@@ -144,7 +144,7 @@ func DefineStreamStartFlags(flags *pflag.FlagSet) {
 
 	flags.String(flagStreamStartTS, "",
 		"usually equals last full backupTS, used for backup log. Default value is current ts.\n"+
-			"support TSO or datetime, e.g. '400036290571534337' or '2018-05-11 01:42:23'.")
+			"support TSO or datetime, e.g. '400036290571534337' or '2018-05-11 01:42:23+0800'.")
 	// 999999999999999999 means 2090-11-18 22:07:45
 	flags.String(flagStreamEndTS, "999999999999999999", "end ts, indicate stopping observe after endTS"+
 		"support TSO or datetime")
@@ -176,7 +176,7 @@ func DefineStreamStatusCommonFlags(flags *pflag.FlagSet) {
 
 func DefineStreamTruncateLogFlags(flags *pflag.FlagSet) {
 	flags.String(flagUntil, "", "Remove all backup data until this TS."+
-		"(support TSO or datetime, e.g. '400036290571534337' or '2018-05-11 01:42:23'.)")
+		"(support TSO or datetime, e.g. '400036290571534337' or '2018-05-11 01:42:23+0800'.)")
 	flags.Bool(flagDryRun, false, "Run the command but don't really delete the files.")
 	flags.BoolP(flagYes, "y", false, "Skip all prompts and always execute the command.")
 }