`lsync.sh` can't show git-diff lines for a specific file

[windsonsea]

After #51413 is merged, this lsync.sh only works for a folder:

$ ./scripts/lsync.sh content/zh-cn/docs/tasks/ 

5	4	content/en/docs/tasks/run-application/horizontal-pod-autoscale.md
9	9	content/en/docs/tasks/manage-kubernetes-objects/storage-version-migration.md
1	1	content/en/docs/tasks/manage-kubernetes-objects/kustomization.md
1	1	content/en/docs/tasks/configure-pod-container/security-context.md
2	2	content/en/docs/tasks/administer-cluster/network-policy-provider/weave-network-policy.md

But it does not work for a specific file. Nothing is output and no any response.

$ ./scripts/lsync.sh content/zh-cn/docs/tasks/manage-kubernetes-objects/kustomization.md
$
$

The output should be similar to:

$ ./scripts/lsync.sh content/zh-cn/docs/tasks/administer-cluster/network-policy-provider/weave-network-policy.md

diff --git a/content/en/docs/tasks/administer-cluster/network-policy-provider/weave-network-policy.md b/content/en/docs/tasks/administer-cluster/network-policy-provider/weave-network-policy.md
index 631d3e6ba5..1b5aa70ad9 100644
--- a/content/en/docs/tasks/administer-cluster/network-policy-provider/weave-network-policy.md
+++ b/content/en/docs/tasks/administer-cluster/network-policy-provider/weave-network-policy.md
@@ -19,10 +19,10 @@ You need to have a Kubernetes cluster. Follow the
 
 ## Install the Weave Net addon
 
-Follow the [Integrating Kubernetes via the Addon](https://www.weave.works/docs/net/latest/kubernetes/kube-addon/) guide.
+Follow the [Integrating Kubernetes via the Addon](https://github.com/weaveworks/weave/blob/master/site/kubernetes/kube-addon.md#-installation) guide.
 
 The Weave Net addon for Kubernetes comes with a
-[Network Policy Controller](https://www.weave.works/docs/net/latest/kubernetes/kube-addon/#npc)
+[Network Policy Controller](https://github.com/weaveworks/weave/blob/master/site/kubernetes/kube-addon.md#network-policy)
 that automatically monitors Kubernetes for any NetworkPolicy annotations on all
 namespaces and configures `iptables` rules to allow or block traffic as directed by the policies.

Every rose has its thorn.

[samzong]

I will test it.

/assign

[samzong]

Hi @windsonsea I fixed the bug in

#51493

and this is my test result.

x in ~/git/kubernetes/kubernetes-website on fix/lsync-diff_oupt ● λ ./scripts/lsync.sh content/zh-cn/docs/tasks/ 
5       4       content/en/docs/tasks/run-application/horizontal-pod-autoscale.md
9       9       content/en/docs/tasks/manage-kubernetes-objects/storage-version-migration.md
1       1       content/en/docs/tasks/manage-kubernetes-objects/kustomization.md
1       1       content/en/docs/tasks/configure-pod-container/security-context.md
2       2       content/en/docs/tasks/administer-cluster/network-policy-provider/weave-network-policy.md
x in ~/git/kubernetes/kubernetes-website on fix/lsync-diff_oupt ● λ ./scripts/lsync.sh content/zh-cn/docs/tasks/manage-kubernetes-objects/kustomization.md
diff --git a/content/en/docs/tasks/manage-kubernetes-objects/kustomization.md b/content/en/docs/tasks/manage-kubernetes-objects/kustomization.md
index df23cc0374..73ec094885 100644
--- a/content/en/docs/tasks/manage-kubernetes-objects/kustomization.md
+++ b/content/en/docs/tasks/manage-kubernetes-objects/kustomization.md
@@ -739,7 +739,7 @@ resources:
 images:
 - name: nginx
   newName: my.image.registry/nginx
-  newTag: 1.4.0
+  newTag: "1.4.0"
 EOF

 
x in ~/git/kubernetes/kubernetes-website on fix/lsync-diff_oupt ● λ ./scripts/lsync.sh content/zh-cn/docs/tasks/administer-cluster/network-policy-provider/weave-network-policy.md
diff --git a/content/en/docs/tasks/administer-cluster/network-policy-provider/weave-network-policy.md b/content/en/docs/tasks/administer-cluster/network-policy-provider/weave-network-policy.md
index 631d3e6ba5..1b5aa70ad9 100644
--- a/content/en/docs/tasks/administer-cluster/network-policy-provider/weave-network-policy.md
+++ b/content/en/docs/tasks/administer-cluster/network-policy-provider/weave-network-policy.md
@@ -19,10 +19,10 @@ You need to have a Kubernetes cluster. Follow the
 
 ## Install the Weave Net addon
 
-Follow the [Integrating Kubernetes via the Addon](https://www.weave.works/docs/net/latest/kubernetes/kube-addon/) guide.
+Follow the [Integrating Kubernetes via the Addon](https://github.com/weaveworks/weave/blob/master/site/kubernetes/kube-addon.md#-installation) guide.
 
 The Weave Net addon for Kubernetes comes with a
-[Network Policy Controller](https://www.weave.works/docs/net/latest/kubernetes/kube-addon/#npc)
+[Network Policy Controller](https://github.com/weaveworks/weave/blob/master/site/kubernetes/kube-addon.md#network-policy)
 that automatically monitors Kubernetes for any NetworkPolicy annotations on all
 namespaces and configures `iptables` rules to allow or block traffic as directed by the policies.

[lmktfy]

/triage accepted