title: Tracing Rails configuration changes
body: <p>An application has a <code>config.action_view.cache_template_loading = true</code> in <code>production.rb</code> but during rendering of the template the setting is <code>nil</code>. How can I trace where it was changed? (Obviously, there are no other mentions of <code>cache_template_loading</code> in project code, it's changed by some external dependency)</p>