Merge pull request kubernetes#39920 from rptaylor/patch-1

fix grammar and incomplete sentence in StatefulSet definition

content/en/docs/reference/glossary/statefulset.md

@@ -4,7 +4,7 @@ id: statefulset
 date: 2018-04-12
 full_link: /docs/concepts/workloads/controllers/statefulset/
 short_description: >
-  Manages deployment and scaling of a set of Pods, with durable storage and persistent identifiers for each Pod.
+  A StatefulSet manages deployment and scaling of a set of Pods, with durable storage and persistent identifiers for each Pod.
 
 aka: 
 tags:
@@ -17,6 +17,6 @@ tags:
 
 <!--more--> 
 
-Like a {{< glossary_tooltip term_id="deployment" >}}, a StatefulSet manages Pods that are based on an identical container spec. Unlike a Deployment, a StatefulSet maintains a sticky identity for each of their Pods. These pods are created from the same spec, but are not interchangeable&#58; each has a persistent identifier that it maintains across any rescheduling.
+Like a {{< glossary_tooltip term_id="deployment" >}}, a StatefulSet manages Pods that are based on an identical container spec. Unlike a Deployment, a StatefulSet maintains a sticky identity for each of its Pods. These pods are created from the same spec, but are not interchangeable&#58; each has a persistent identifier that it maintains across any rescheduling.
 
 If you want to use storage volumes to provide persistence for your workload, you can use a StatefulSet as part of the solution. Although individual Pods in a StatefulSet are susceptible to failure, the persistent Pod identifiers make it easier to match existing volumes to the new Pods that replace any that have failed.