Replace should-example with expect-example

lib/rubocop/cop/rspec/named_subject.rb

@@ -6,7 +6,7 @@ module RSpec
       # Checks for explicitly referenced test subjects.
       #
       # RSpec lets you declare an "implicit subject" using `subject { ... }`
-      # which allows for tests like `it { should be_valid }`. If you need to
+      # which allows for tests like `it { is_expected.to be_valid }`. If you need to
       # reference your test subject you should explicitly name it using
       # `subject(:your_subject_name) { ... }`. Your test subjects should be
       # the most important object in your tests so they deserve a descriptive
@@ -39,7 +39,7 @@ module RSpec
       #   RSpec.describe Foo do
       #     subject(:user) { described_class.new }
       #
-      #     it { should be_valid }
+      #     it { is_expected.to be_valid }
       #   end
       class NamedSubject < Cop
         MSG = 'Name your test subject if you need '\

manual/cops_rspec.md

@@ -2155,7 +2155,7 @@ end
 RSpec.describe Foo do
   subject(:user) { described_class.new }
 
-  it { should be_valid }
+  it { is_expected.to be_valid }
 end
 ```