Enable reply_to_individual_notes feature flag by default

app/controllers/concerns/issuable_actions.rb

@@ -8,7 +8,7 @@ module IssuableActions
     before_action :authorize_destroy_issuable!, only: :destroy
     before_action :authorize_admin_issuable!, only: :bulk_update
     before_action only: :show do
-      push_frontend_feature_flag(:reply_to_individual_notes)
+      push_frontend_feature_flag(:reply_to_individual_notes, default_enabled: true)
     end
   end

app/models/individual_note_discussion.rb

@@ -14,7 +14,7 @@ class IndividualNoteDiscussion < Discussion
   end
   def can_convert_to_discussion?
-    noteable.supports_replying_to_individual_notes? && Feature.enabled?(:reply_to_individual_notes)
+    noteable.supports_replying_to_individual_notes? && Feature.enabled?(:reply_to_individual_notes, default_enabled: true)
   end
   def convert_to_discussion!(save: false)

changelogs/unreleased/winh-enable-reply_to_individual_notes.yml

+---
+title: Add button to start discussion from single comment
+merge_request: 25575
+author:
+type: added

spec/features/merge_request/user_posts_notes_spec.rb

@@ -67,7 +67,7 @@ describe 'Merge request > User posts notes', :js do
       end
     end
-    describe 'when reply_to_individual_notes feature flag is not set' do
+    describe 'when reply_to_individual_notes feature flag is disabled' do
       before do
         stub_feature_flags(reply_to_individual_notes: false)
         visit project_merge_request_path(project, merge_request)
@@ -78,9 +78,8 @@ describe 'Merge request > User posts notes', :js do
       end
     end
-    describe 'when reply_to_individual_notes feature flag is set' do
+    describe 'when reply_to_individual_notes feature flag is not set' do
       before do
-        stub_feature_flags(reply_to_individual_notes: true)
         visit project_merge_request_path(project, merge_request)
       end