Build messages used on the project settings page

app/helpers/push_rules_helper.rb

 module PushRulesHelper
   def reject_unsigned_commits_description(push_rule)
-    message = [s_("ProjectSettings|Only signed commits can be pushed to this repository.")]
+    message = s_("ProjectSettings|Only signed commits can be pushed to this repository.")
 
     push_rule_update_description(message, push_rule, :reject_unsigned_commits)
   end
 
   def commit_committer_check_description(push_rule)
-    message = [s_("ProjectSettings|Only the committer of a commit can push changes to this repository.")]
+    message = s_("ProjectSettings|Only the committer of a commit can push changes to this repository.")
 
     push_rule_update_description(message, push_rule, :commit_committer_check)
   end
@@ -14,23 +14,24 @@ module PushRulesHelper
   private
 
   def push_rule_update_description(message, push_rule, rule)
+    messages = [message]
     if push_rule.global?
-      message << s_("ProjectSettings|This setting will be applied to all projects unless overridden by an admin.")
+      messages << s_("ProjectSettings|This setting will be applied to all projects unless overridden by an admin.")
     else
       enabled_globally = PushRule.global&.public_send(rule) # rubocop:disable GitlabSecurity/PublicSend
       enabled_in_project = push_rule.public_send(rule) # rubocop:disable GitlabSecurity/PublicSend
 
       if enabled_globally
-        message << if enabled_in_project
-                     s_("ProjectSettings|This setting is applied on the server level and can be overridden by an admin.")
-                   else
-                     s_("ProjectSettings|This setting is applied on the server level but has been overridden for this project.")
-                   end
+        messages << if enabled_in_project
+                      s_("ProjectSettings|This setting is applied on the server level and can be overridden by an admin.")
+                    else
+                      s_("ProjectSettings|This setting is applied on the server level but has been overridden for this project.")
+                    end
 
-        message << s_("ProjectSettings|Contact an admin to change this setting.") unless current_user.admin?
+        messages << s_("ProjectSettings|Contact an admin to change this setting.") unless current_user.admin?
       end
     end
 
-    message.join(' ')
+    messages.join(' ')
   end
 end