Removed char substitution for event message in audit detail class

ee/lib/audit/details.rb

@@ -24,7 +24,6 @@ module Audit
 
     def action_text
       action = @details.slice(*ACTIONS)
-      value = @details.values.first.tr('_', ' ')
 
       case action.keys.first
       when :add
@@ -48,5 +47,11 @@ module Audit
 
       changed.join(' ')
     end
+
+    def value
+      target_type = @details[:target_type].constantize
+      val = @details.values.first
+      target_type == Operations::FeatureFlag ? val : val.tr('_', ' ')
+    end
   end
 end

ee/spec/lib/audit/details_spec.rb

@@ -47,6 +47,7 @@ describe Audit::Details do
       let(:user_member) { create(:user) }
       let(:group) { create(:group) }
       let(:member) { create(:group_member, group: group, user: user_member) }
+      let(:target_type) { 'User' }
       let(:member_access_action) do
         {
           change: 'access_level',
@@ -54,11 +55,12 @@ describe Audit::Details do
           to: member.human_access,
           author_name: user.name,
           target_id: member.id,
-          target_type: 'User',
+          target_type: target_type,
           target_details: member.user.name
         }
       end
 
+      context 'when the target_type is not Operations::FeatureFlag' do
         it 'humanizes add group member access action' do
           string = described_class.humanize(member_access_action)
 
@@ -66,6 +68,16 @@ describe Audit::Details do
         end
       end
 
+      context 'when the target_type is Operations::FeatureFlag' do
+        let(:target_type) { 'Operations::FeatureFlag' }
+        it 'leaves access_level as it is' do
+          string = described_class.humanize(member_access_action)
+
+          expect(string).to eq('Changed access_level from Guest to Owner')
+        end
+      end
+    end
+
     context 'deploy key' do
       let(:removal_action) do
         {