title: expect(klass).to receive(:new) syntax
body: <p>I've expected the following to work</p>
  
  <pre><code>expect(UserUpdateService).to receive(:new)
  </code></pre>
  
  <p>but it's throws an expection</p>
  
  <pre><code>undefined method `receive' for #&lt;RSpec::Core::ExampleGroup::Nested_1:0x007faa044d42d8&gt;
  </code></pre>
  
  <p>The 'old' syntax, however, works:</p>
  
  <pre><code>UserUpdateService.should_receive(:new)
  </code></pre>
  
  <p>Any idea why the first/new syntax throws an exception?</p>