Update lib/rspec/support/differ.rb

Co-authored-by: Jon Rowe <[email protected]>

Author: pirj

lib/rspec/support/differ.rb

@@ -61,7 +61,7 @@ def diff_as_string(actual, expected)
       if defined?(RSpec::Mocks::ArgumentMatchers::AnyArgMatcher)
         def diff_hashes_as_object(actual, expected)
           actual_to_diff =
-            actual.reduce({}) do |hash, (key, value)|
+            actual.keys.reduce({}) do |hash, key|
               if RSpec::Mocks::ArgumentMatchers::AnyArgMatcher === expected[key]
                 hash[key] = expected[key]
               else