fix locale

Author: wxiaoguang

options/locale/locale_en-US.ini

@@ -1685,16 +1685,16 @@ issues.timetracker_timer_manually_add = Add Time
 
 issues.time_estimate_set = Set estimated time
 issues.time_estimate_display = Estimate: %s
-issues.change_time_estimate_at = changed time estimate to <b>%s</b> %s
+issues.change_time_estimate_at = changed time estimate to <b>%[1]s</b> %[2]s
 issues.remove_time_estimate_at = removed time estimate %s
 issues.time_estimate_invalid = Time estimate format is invalid
 issues.start_tracking_history = started working %s
 issues.tracker_auto_close = Timer will be stopped automatically when this issue gets closed
 issues.tracking_already_started = `You have already started time tracking on <a href="%s">another issue</a>!`
-issues.stop_tracking_history = worked for <b>%s</b> %s
+issues.stop_tracking_history = worked for <b>%[1]s</b> %[2]s
 issues.cancel_tracking_history = `canceled time tracking %s`
 issues.del_time = Delete this time log
-issues.add_time_history = added spent time <b>%s</b> %s
+issues.add_time_history = added spent time <b>%[1]s</b> %[2]s
 issues.del_time_history= `deleted spent time %s`
 issues.add_time_manually = Manually Add Time
 issues.add_time_hours = Hours