Fix rubocop warnings

Author: diebas

app/models/facility.rb

@@ -169,13 +169,13 @@ def show_multi_add_products?(product_scope, user)
   private
 
   def set_journal_mask
-    max_number = Facility.all
-                         .pluck(:journal_mask)
-                         .filter_map { |mask| mask&.match(/^C(\d{2,3})$/)&.[](1)&.to_i }
-                         .max
-  
-    next_number = max_number ? max_number + 1 : 1
-    self.journal_mask = format("C%0#{next_number < 100 ? 2 : 3}d", next_number)
+    f = Facility.all.order(journal_mask: :desc).first
+    self.journal_mask = if f&.journal_mask&.match(/^C(\d{2,3})$/)
+                          next_number = Regexp.last_match(1).to_i + 1
+                          format("C%0#{next_number < 100 ? 2 : 3}d", next_number)
+                        else
+                          "C01"
+                        end
   end
 
 end