Add tests for the descriptions of operator matchers

spec/rspec/matchers/built_in/operators_spec.rb

@@ -242,6 +242,12 @@ def method_missing(name, *args, &block)
         o.should != o
       }.to raise_error(/does not support `should != .*Use `should_not ==/)
     end
+
+    it "is described correctly" do
+      matcher = 7.should
+      matcher.==(7)
+      expect(matcher.description).to eq("== 7")
+    end
   end
 
   describe RSpec::Matchers::BuiltIn::NegativeOperatorMatcher do
@@ -259,5 +265,11 @@ def method_missing(name, *args, &block)
         o.should_not != :foo
       }.to raise_error(/does not support `should_not != .*Use `should ==/)
     end
+
+    it "is described correctly" do
+      matcher = 7.should_not
+      matcher.==(8)
+      expect(matcher.description).to eq("== 8")
+    end
   end
 end