address feedback and add comment about e2e tests

keps/sig-node/1967-size-memory-backed-volumes/README.md

@@ -140,6 +140,10 @@ To verify the pod available memory scenario, we will verify the
 memory backed volume size is equivalent to the pod cgroup memory
 or node allocatable memory limit.
 
+We have eviction tests that make sure size backed volumes cannot exceed the size limit.
+
+See [eviction test](https://github.com/kubernetes/kubernetes/blob/b2031b3cb46e946ee72eab7bda87b046db138d62/test/e2e_node/eviction_test.go#L366).
+
 ### Graduation Criteria
 
 #### Alpha -> Beta Graduation
@@ -237,7 +241,7 @@ This does not seem relevant to this feature.
 #### How can someone using this feature know that it is working for their instance?
 
 - [x] Other
-  - Details: An operator can audit for pods whose emptyDir medium is     memory and a size limit
+  - Details: An operator can audit for pods whose emptyDir medium is memory and a size limit
   is specified.
 
 #### What are the reasonable SLOs (Service Level Objectives) for the above SLIs?
@@ -264,9 +268,7 @@ No.
 
 No
 
-#### Will enabling / using this feature result in any new calls to the cloud?
-
-provider?
+#### Will enabling / using this feature result in any new calls to the cloud provider?
 
 No