Fix call to Settings.instance.inspect

lib/active_settings/config.rb

@@ -47,9 +47,12 @@ def merge!(other)
 
 
     def method_missing(method_name, *args)
+      return super if method_name == :respond_to_missing?
+
       if ActiveSettings.fail_on_missing && method_name !~ /.*(?==\z)/m
         raise KeyError, "key not found: #{method_name.inspect}" unless key?(method_name)
       end
+
       super
     end
 
@@ -58,5 +61,7 @@ def respond_to_missing?(method_name, include_private = false)
       key?(method_name) || super
     end
 
+    public :respond_to_missing?
+
   end
 end