Merge pull request #1070 from helinwang/aws

remove double spaces, remove chinese character "，"

doc/howto/usage/k8s/k8s_aws_en.md

@@ -360,7 +360,7 @@ In one time of distributed training, user will confirm the PaddlePaddle node num
 
 ####Create PaddlePaddle Node
 
-After Kubernetes master gets the request, it will parse the yaml file and create several pods (defined by PaddlePaddle's node number)， Kubernetes will allocate these pods onto cluster's node. A pod represents a PaddlePaddle node, when pod is successfully allocated onto one physical/virtual machine, Kubernetes will startup the container in the pod, and this container will use the environment variables in yaml file and start up `paddle pserver` and `paddle trainer` processes.
+After Kubernetes master gets the request, it will parse the yaml file and create several pods (defined by PaddlePaddle's node number), Kubernetes will allocate these pods onto cluster's node. A pod represents a PaddlePaddle node, when pod is successfully allocated onto one physical/virtual machine, Kubernetes will startup the container in the pod, and this container will use the environment variables in yaml file and start up `paddle pserver` and `paddle trainer` processes.
 
 
 ####Start up Training