lib/truemail.rb in truemail-2.2.3 vs lib/truemail.rb in truemail-2.3.0

@@ -44,10 +44,10 @@
     def raise_unless(condition, message, error_class = Truemail::ConfigurationError)
       raise error_class, message unless condition
     end
 
     def check_argument_type(argument)
-      raise_unless(argument.is_a?(String), Truemail::INVALID_TYPE, Truemail::TypeError)
+      raise_unless(argument.is_a?(::String), Truemail::INVALID_TYPE, Truemail::TypeError)
     end
 
     def determine_configuration(custom_configuration)
       current_configuration = custom_configuration || configuration
       raise_unless(current_configuration, Truemail::NOT_CONFIGURED)