Minor code quality improvements (#10905)

frontend/apps/reader/modules/readersearch.lua

@@ -287,12 +287,12 @@ function ReaderSearch:onShowSearchDialog(text, direction, regex, case_insensitiv
                 self.wait_button.movable:setMovedOffset(self.search_dialog.movable:getMovedOffset())
                 UIManager:show(self.wait_button)
                 UIManager:tickAfterNext(function()
-                    do_search(func, pattern, param, regex, case_insensitive)()
+                    do_search(func, pattern, param)()
                     UIManager:close(self.wait_button)
                 end)
             end
         else
-            return do_search(func, pattern, param, regex, case_insensitive)
+            return do_search(func, pattern, param)
         end
     end
     self.search_dialog = ButtonDialog:new{
@@ -342,14 +342,14 @@ function ReaderSearch:onShowSearchDialog(text, direction, regex, case_insensitiv
         -- initial position: center of the screen
         UIManager:show(self.wait_button)
         UIManager:tickAfterNext(function()
-            do_search(self.searchFromCurrent, text, direction, regex, case_insensitive)()
+            do_search(self.searchFromCurrent, text, direction)()
             UIManager:close(self.wait_button)
             UIManager:show(self.search_dialog)
             --- @todo regional
             UIManager:setDirty(self.dialog, "partial")
         end)
     else
-        do_search(self.searchFromCurrent, text, direction, regex, case_insensitive)()
+        do_search(self.searchFromCurrent, text, direction)()
         UIManager:show(self.search_dialog)
         --- @todo regional
         UIManager:setDirty(self.dialog, "partial")

frontend/document/doccache.lua

@@ -38,7 +38,7 @@ local function computeCacheSlots()
 
     --- ...otherwise, effectively disable the cache by making it single slot...
     if mb_size < 8 then
-        logger.dbg(string.format("Setting up a minimal single slot global document cache"))
+        logger.dbg("Setting up a minimal single slot global document cache")
         return 1
     else
         return nil

frontend/ui/widget/focusmanager.lua

@@ -369,7 +369,7 @@ end
 
 function FocusManager:_verticalStep(dy)
     local x = self.selected.x
-    if type(self.layout[self.selected.y + dy]) ~= "table" or self.layout[self.selected.y + dy] == {} then
+    if type(self.layout[self.selected.y + dy]) ~= "table" or next(self.layout[self.selected.y + dy]) == nil then
         logger.err("[FocusManager] : Malformed layout")
         return false
     end