Merge pull request #14779 from duglin/BetterErrMsg14774

Add better output for TestLinksEtcHostsContentMatch to help debug #14774
Upstream-commit: efd56bbe6fe9b2725d45327e84b39601c726ca15
Component: engine

components/engine/integration-cli/docker_cli_links_unix_test.go

@@ -27,7 +27,7 @@ func (s *DockerSuite) TestLinksEtcHostsContentMatch(c *check.C) {
 	}
 
 	if out != string(hosts) {
-		c.Errorf("container")
+		c.Errorf("container: %s\n\nhost:%s", out, hosts)
 	}
 
 }