Merge pull request kubernetes#2105 from draveness/patch-7

doc: add diff before the code block in topology manager KEP

Author: k8s-ci-robot

keps/sig-node/0035-20190130-topology-manager.md

@@ -491,7 +491,7 @@ Additionally, we propose an extension to the device plugin interface as a
 "last-level" filter to help influence overall allocation decisions made by the
 `devicemanager`. The diff below shows the proposed changes:
 
-```
+```diff
 diff --git a/pkg/kubelet/apis/deviceplugin/v1beta1/api.proto b/pkg/kubelet/apis/deviceplugin/v1beta1/api.proto
 index 758da317fe..1e55d9c541 100644
 --- a/pkg/kubelet/apis/deviceplugin/v1beta1/api.proto
@@ -673,4 +673,4 @@ systems test.
 [numa-challenges]: https://queue.acm.org/detail.cfm?id=2852078
 [the-rule-of-effective-request-limit]: https://kubernetes.io/docs/concepts/workloads/pods/init-containers/#resources
 [debug-container]: https://kubernetes.io/docs/tasks/debug-application-cluster/debug-running-pod/#ephemeral-container
-[ephemeral-container]: https://kubernetes.io/docs/concepts/workloads/pods/ephemeral-containers/
+[ephemeral-container]: https://kubernetes.io/docs/concepts/workloads/pods/ephemeral-containers/