Use newer hash style

app/helpers/milestones_helper.rb

@@ -41,9 +41,9 @@ module MilestonesHelper
   def milestone_counts(project:)
     counts = @project.milestones.reorder(nil).group(:state).count()
     {
-      'opened' => counts['active'],
-      'closed' => counts['closed'],
-      'all' => counts['active'] + counts['closed']
+      opened: counts['active'],
+      closed: counts['closed'],
+      all: counts['active'] + counts['closed']
     }
   end
 

app/views/shared/_milestones_filter.html.haml

@@ -4,12 +4,12 @@
   %li{class: ("active" if params[:state].blank? || params[:state] == 'opened')}
     = link_to milestones_filter_path(state: 'opened') do
       Open
-      %span.badge #{counts['opened']}
+      %span.badge #{counts[:opened]}
   %li{class: ("active" if params[:state] == 'closed')}
     = link_to milestones_filter_path(state: 'closed') do
       Closed
-      %span.badge #{counts['closed']}
+      %span.badge #{counts[:closed]}
   %li{class: ("active" if params[:state] == 'all')}
     = link_to milestones_filter_path(state: 'all') do
       All
-      %span.badge #{counts['all']}
+      %span.badge #{counts[:all]}