chore: code clean up

frontend/apps/reader/modules/readerbookmark.lua

@@ -88,7 +88,7 @@ end
 
 function ReaderBookmark:onShowBookmark()
     -- build up item_table
-    for k, v in    ipairs(self.bookmarks) do
+    for k, v in ipairs(self.bookmarks) do
         local page = v.page
         -- for CREngine, bookmark page is xpointer
         if type(page) == "string" then

frontend/ui/device.lua

@@ -201,8 +201,8 @@ end
 
 function Device:onPowerEvent(ev)
     local Screensaver = require("ui/screensaver")
-    local UIManager = require("ui/uimanager")
     if (ev == "Power" or ev == "Suspend") and not self.screen_saver_mode then
+        local UIManager = require("ui/uimanager")
         DEBUG("Suspending...")
         -- always suspend in portrait mode
         self.orig_rotation_mode = Screen:getRotationMode()