Update multiple-schedulers doc (#2063)

* Update tutorial

* Fix md formatting.

* Remove extraneous space

docs/admin/multiple-schedulers.md

@@ -34,7 +34,7 @@ to build the image:
 
 ```docker
 FROM busybox
-ADD _output/local/go/bin/kube-scheduler /usr/local/bin/kube-scheduler
+ADD ./_output/dockerized/bin/linux/amd64/kube-scheduler /usr/local/bin/kube-scheduler
 ```
 
 Save the file as `Dockerfile`, build the image and push it to a registry. This example
@@ -45,7 +45,7 @@ For more details, please read the GCR
 
 ```shell
 docker build -t my-kube-scheduler:1.0 .
-gcloud docker push gcr.io/my-gcp-project/my-kube-scheduler:1.0
+gcloud docker -- push gcr.io/my-gcp-project/my-kube-scheduler:1.0
 ```
 
 ### 2. Define a Kubernetes Deployment for the scheduler

docs/admin/multiple-schedulers/my-scheduler.yaml

@@ -16,8 +16,11 @@ spec:
         version: second
     spec:
       containers:
-      - command: [/usr/local/bin/kube-scheduler, --address=0.0.0.0,
+      - command:
-                  --scheduler-name=my-scheduler, --leader-elect=false]
+        - /usr/local/bin/kube-scheduler
+        - --address=0.0.0.0
+        - --leader-elect=false
+        - --scheduler-name=my-scheduler
         image: gcr.io/my-gcp-project/my-kube-scheduler:1.0
         livenessProbe:
           httpGet: