lib/rubocop/cop/rspec/message_expectation.rb in rubocop-rspec-1.20.1 vs lib/rubocop/cop/rspec/message_expectation.rb in rubocop-rspec-1.21.0

@@ -25,11 +25,11 @@
       #   expect(foo).to receive(:bar)
       #
       class MessageExpectation < Cop
         include ConfigurableEnforcedStyle
 
-        MSG = 'Prefer `%s` for setting message expectations.'.freeze
+        MSG = 'Prefer `%<style>s` for setting message expectations.'.freeze
 
         SUPPORTED_STYLES = %w[allow expect].freeze
 
         def_node_matcher :message_expectation, <<-PATTERN
           (send $(send nil? {:expect :allow} ...) :to #receive_message?)
@@ -39,10 +39,11 @@
 
         def on_send(node)
           message_expectation(node) do |match|
             return correct_style_detected if preferred_style?(match)
 
-            add_offense(match, location: :selector, message: MSG % style) do
+            message = format(MSG, style: style)
+            add_offense(match, location: :selector, message: message) do
               opposite_style_detected
             end
           end
         end