Replace nil check using ternary operator with safe navigation operator when accessing hashes (#41884).

Using the ternary operator for nil checking caused a runtime error in the Style/SafeNavigation cop during `rubocop --regenerate-todo` with RuboCop 1.76.0. Replacing it with the safe navigation operator avoids the error.


git-svn-id: https://svn.redmine.org/redmine/trunk@23824 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/helpers/queries_helper.rb

@@ -169,7 +169,7 @@ module QueriesHelper
             group_name = format_object(group)
           end
           group_name ||= ""
-          group_count = result_count_by_group ? result_count_by_group[group] : nil
+          group_count = result_count_by_group&.[](group)
           group_totals = totals_by_group.map {|column, t| total_tag(column, t[group] || 0)}.join(" ").html_safe
         end
       end

app/models/user_preference.rb

@@ -73,7 +73,7 @@ class UserPreference < ApplicationRecord
     if has_attribute? attr_name
       super
     else
-      others ? others[attr_name] : nil
+      others&.[](attr_name)
     end
   end