updates based on feedback

Author: georgewallace

deploy-manage/distributed-architecture/clusters-nodes-shards/node-roles.md

@@ -3,6 +3,7 @@ mapped_pages:
   - https://www.elastic.co/guide/en/elasticsearch/reference/current/node-roles-overview.html
 applies_to:
   stack:
+  self:
 ---
 
 # Node roles [node-roles-overview]

deploy-manage/distributed-architecture/reading-and-writing-documents.md

@@ -96,6 +96,6 @@ A single shard can slow down indexing
 Dirty reads
 :   An isolated primary can expose writes that will not be acknowledged. This is caused by the fact that an isolated primary will only realize that it is isolated once it sends requests to its replicas or when reaching out to the master. At that point the operation is already indexed into the primary and can be read by a concurrent read. Elasticsearch mitigates this risk by pinging the master every second (by default) and rejecting indexing operations if no master is known.
 
-## The Tip of the Iceberg [_the_tip_of_the_iceberg]
+## The tip of the iceberg [_the_tip_of_the_iceberg]
 
 This document provides a high level overview of how Elasticsearch deals with data. Of course, there is much more going on under the hood. Things like primary terms, cluster state publishing, and master election all play a role in keeping this system behaving correctly. This document also doesn’t cover known and important bugs (both closed and open). We recognize that [GitHub is hard to keep up with](https://github.com/elastic/elasticsearch/issues?q=label%3Aresiliency). To help people stay on top of those, we maintain a dedicated [resiliency page](https://www.elastic.co/guide/en/elasticsearch/resiliency/current/index.html) on our website. We strongly advise reading it.

deploy-manage/distributed-architecture/shard-allocation-relocation-recovery/shard-allocation-awareness.md

@@ -3,6 +3,7 @@ mapped_pages:
   - https://www.elastic.co/guide/en/elasticsearch/reference/current/shard-allocation-awareness.html
 applies_to:
   stack:
+  self:
 ---
 
 # Shard allocation awareness [shard-allocation-awareness]