Fix tests to expect a non-match, not an error

In rspec/rspec-expectations#1449, the `Include`
matcher is fixed so that it doesn't raise an error when types don't
match. Instead, the actual and expected will be deemed to not match.

spec/rspec/rails/matchers/be_a_new_spec.rb

@@ -79,12 +79,7 @@ def new_record?; true; end
 
           context "matcher is wrong type" do
             it "fails" do
-              expect {
-                expect(record).to be_a_new(record.class).with(
-                  foo: a_hash_including({ no_foo: "foo" }))
-              }.to raise_error { |e|
-                expect(e.message).to eq("no implicit conversion of Hash into String").or eq("can't convert Hash into String")
-              }
+              expect(record).not_to be_a_new(record.class).with(foo: a_hash_including({ no_foo: "foo" }))
             end
           end
         end