lib/rspec/expectations/fail_with.rb in rspec-expectations-2.9.0 vs lib/rspec/expectations/fail_with.rb in rspec-expectations-2.9.1

@@ -3,11 +3,11 @@
     class << self
       # @private
       def differ
         @differ ||= Differ.new
       end
-      
+
       # Raises an RSpec::Expectations::ExpectationNotMetError with message.
       # @param [String] message
       # @param [Object] expected
       # @param [Object] actual
       #
@@ -20,9 +20,10 @@
         end
 
         if actual && expected
           if all_strings?(actual, expected)
             if any_multiline_strings?(actual, expected)
+              expected = expected.join(',') if Array === expected
               message << "\nDiff:" << differ.diff_as_string(actual, expected)
             end
           elsif no_procs?(actual, expected) && no_numbers?(actual, expected)
             message << "\nDiff:" << differ.diff_as_object(actual, expected)
           end