Replace .negative? with < 0 for older ruby versions

Joel Lubrano · Joel Lubrano · commit d77f25d7eb28 · 2018-12-24T15:49:39.000-05:00
diff --git a/lib/rspec/rails/matchers/have_enqueued_mail.rb b/lib/rspec/rails/matchers/have_enqueued_mail.rb
@@ -108,7 +108,7 @@ def mailer_args
           else
             mailer_method_arity = @mailer_class.instance_method(@method_name).arity
 
-            number_of_args = if mailer_method_arity.negative?
+            number_of_args = if mailer_method_arity < 0
                                (mailer_method_arity + 1).abs
                              else
                                mailer_method_arity
