revise doc

Signed-off-by: Rafael Vasquez <[email protected]>

docs/guidance/rayjob.md

@@ -27,11 +27,11 @@ For installation instructions, please follow [the documentation](../deploy/insta
 
 ### Run an example Job
 
-There is one example config file to deploy RayJob included here:
+There is one example config file to deploy a RayJob included here:
 [ray_v1alpha1_rayjob.yaml](https://github.com/ray-project/kuberay/blob/master/ray-operator/config/samples/ray_v1alpha1_rayjob.yaml)
 
 ```shell
-# Create a ray job.
+# Create a RayJob.
 $ kubectl apply -f config/samples/ray_v1alpha1_rayjob.yaml
 ```
 
@@ -43,8 +43,8 @@ rayjob-sample   7s
 ```
 
 ```shell
-# RayJob sample will also create a raycluster
-# raycluster will create few resources including pods, services, you can use the following commands check them
+# RayJob sample will also create a raycluster.
+# raycluster will create few resources including pods and services. You can use the following commands to check them:
 $ kubectl get rayclusters
 $ kubectl get pod
 ```