[plugin] String and formatting (#8980)

Easy the life of translators and fixes a stupid string typo.

plugins/autosuspend.koplugin/_meta.lua

@@ -2,5 +2,5 @@ local _ = require("gettext")
 return {
     name = "autosuspend",
     fullname = _("Auto power save"),
-    description = _([["Puts the device into standby, suspend or power off after specified periods of inactivity."]]),
+    description = _([[Puts the device into standby, suspend or power off after specified periods of inactivity.]]),
 }

plugins/systemstat.koplugin/main.lua

@@ -44,14 +44,14 @@ function SystemStat:appendCounters()
     if self.resume_sec then
         self:put({_("  Last resume time"), os.date("%c", self.resume_sec)})
     end
-    self:put({_("  Up time"),
+    self:put({"  " .. _("Up time"),
             util.secondsToClockDuration("", os.difftime(os.time(), self.start_sec), false, true, true)})
     if Device:canSuspend() then
-        self:put({_("  Time in suspend"),
+        self:put({"  " .. _("Time in suspend"),
             util.secondsToClockDuration("", Device.total_suspend_tv:tonumber(), false, true, true)})
     end
     if Device:canStandby() then
-        self:put({_("  Time in standby"),
+        self:put({"  " .. _("Time in standby"),
             util.secondsToClockDuration("", Device.total_standby_tv:tonumber(), false, true, true)})
     end
     self:put({_("Counters"), ""})