Convert specs to RSpec 2.99.2 syntax with Transpec

This conversion is done by Transpec 3.1.0 with the following command:
    transpec

* 424 conversions
    from: obj.should
      to: expect(obj).to

* 325 conversions
    from: == expected
      to: eq(expected)

* 38 conversions
    from: obj.should_not
      to: expect(obj).not_to

* 15 conversions
    from: =~ /pattern/
      to: match(/pattern/)

* 9 conversions
    from: it { should ... }
      to: it { is_expected.to ... }

* 5 conversions
    from: lambda { }.should_not
      to: expect { }.not_to

* 4 conversions
    from: lambda { }.should
      to: expect { }.to

* 2 conversions
    from: -> { }.should
      to: expect { }.to

* 2 conversions
    from: -> { }.should_not
      to: expect { }.not_to

* 1 conversion
    from: === expected
      to: be === expected

* 1 conversion
    from: =~ [1, 2]
      to: match_array([1, 2])

For more details: https://github.com/yujinakayama/transpec#supported-conversions

spec/controllers/posts_controller_spec.rb

@@ -851,8 +851,8 @@ describe PostsController do
       it "can be viewed by anonymous" do
         post = Fabricate(:post, raw: "123456789")
         xhr :get, :markdown_id, id: post.id
-        response.should be_success
-        response.body.should == "123456789"
+        expect(response).to be_success
+        expect(response.body).to eq("123456789")
       end
     end
 
@@ -862,8 +862,8 @@ describe PostsController do
         post = Fabricate(:post, topic: topic, post_number: 1, raw: "123456789")
         post.save
         xhr :get, :markdown_num, topic_id: topic.id, post_number: 1
-        response.should be_success
-        response.body.should == "123456789"
+        expect(response).to be_success
+        expect(response.body).to eq("123456789")
       end
     end
   end
@@ -874,13 +874,13 @@ describe PostsController do
 
     it "redirects to the topic" do
       xhr :get, :short_link, post_id: post.id
-      response.should be_redirect
+      expect(response).to be_redirect
     end
 
     it "returns a 403 when access is denied" do
       Guardian.any_instance.stubs(:can_see?).returns(false)
       xhr :get, :short_link, post_id: post.id
-      response.should be_forbidden
+      expect(response).to be_forbidden
     end
   end
 end