Update some readme.md files in client-go

Author: xichengliudui

staging/src/k8s.io/client-go/INSTALL.md

@@ -7,7 +7,7 @@ library install, don't mind getting HEAD (which may be less stable than a
 particular release), then simply:
 
 ```sh
-$ go get k8s.io/client-go@master
+go get k8s.io/client-go@master
 ```
 
 This will record a dependency on `k8s.io/client-go` in your go module.
@@ -24,12 +24,12 @@ If you are using a version of go prior to 1.11, or do not wish to use
 go modules, you can download `k8s.io/client-go` to your `$GOPATH` instead:
 
 ```sh
-$ go get -u k8s.io/client-go/...
-$ go get -u k8s.io/apimachinery/...
-$ cd $GOPATH/src/k8s.io/client-go
-$ git checkout v11.0.0
-$ cd $GOPATH/src/k8s.io/apimachinery
-$ git checkout kubernetes-1.14.0
+go get -u k8s.io/client-go/...
+go get -u k8s.io/apimachinery/...
+cd $GOPATH/src/k8s.io/client-go
+git checkout v11.0.0
+cd $GOPATH/src/k8s.io/apimachinery
+git checkout kubernetes-1.14.0
 ```
 
 This downloads a version of `k8s.io/client-go` prior to v1.12.0,

staging/src/k8s.io/client-go/examples/in-cluster-client-configuration/README.md

@@ -37,7 +37,7 @@ kubectl create clusterrolebinding default-view --clusterrole=view --serviceaccou
 
 Then, run the image in a Pod with a single instance Deployment:
 
-    $ kubectl run --rm -i demo --image=in-cluster --image-pull-policy=Never
+    kubectl run --rm -i demo --image=in-cluster --image-pull-policy=Never
 
     There are 4 pods in the cluster
     There are 4 pods in the cluster

staging/src/k8s.io/client-go/examples/leader-election/README.md

@@ -8,14 +8,14 @@ Run the following three commands in separate terminals. Each terminal needs a un
 
 ```bash
 # first terminal 
-$ go run *.go -kubeconfig=/my/config -logtostderr=true -id=1
+go run *.go -kubeconfig=/my/config -logtostderr=true -id=1
 
 # second terminal 
-$ go run *.go -kubeconfig=/my/config -logtostderr=true -id=2
+go run *.go -kubeconfig=/my/config -logtostderr=true -id=2
 
 # third terminal
-$ go run *.go -kubeconfig=/my/config -logtostderr=true -id=3
+go run *.go -kubeconfig=/my/config -logtostderr=true -id=3
 ```
 > You can ignore the `-kubeconfig` flag if you are running these commands in the Kubernetes cluster.
 
-Now kill the existing leader. You will see from the terminal outputs that one of the remaining two processes will be elected as the new leader.
+Now kill the existing leader. You will see from the terminal outputs that one of the remaining two processes will be elected as the new leader.

staging/src/k8s.io/client-go/examples/out-of-cluster-client-configuration/README.md

@@ -22,7 +22,7 @@ Run this application with:
 Running this application will use the kubeconfig file and then authenticate to the
 cluster, and print the number of pods in the cluster every 10 seconds:
 
-    $ ./app
+    ./app
     There are 3 pods in the cluster
     There are 3 pods in the cluster
     There are 3 pods in the cluster