Merge pull request #3207 from knightXun/patch-3

make the doc easy understand

contributors/design-proposals/apps/indexed-job.md

@@ -144,7 +144,7 @@ Also, as a shortcut, for small worklists, it can be included in an annotation on
 the Job object, which is then exposed as a volume in the pod via the downward
 API.
 
-### What Varies Between Pods of a Job
+### What Varies Between Pods of an indexed-job
 
 Pods need to differ in some way to do something different. (They do not differ
 in the work-queue style of Job, but that style has ease-of-use issues).
@@ -184,7 +184,7 @@ Experience in [similar systems](http://static.googleusercontent.com/media/resear
 has shown this model to be applicable to a very broad range of problems, despite
 this restriction.
 
-Therefore we to allow pods in the same Job to differ **only** in the following
+Therefore we want to allow pods in the same Job to differ **only** in the following
  aspects:
 - command line
 - environment variables