Merge branch 'simplify-geo-doc-wording' into 'master'

Simplify Geo doc wording

See merge request gitlab-org/gitlab-ee!5618

doc/administration/geo/replication/index.md

 # Geo (Geo Replication) **[PREMIUM ONLY]**
 
 > **Notes:**
-- Geo is part of [GitLab Premium][ee].
-- Introduced in GitLab Enterprise Edition 8.9.
+- Geo is part of [GitLab Premium][ee]
+- Introduced in GitLab Enterprise Edition 8.9
   We recommend you use it with at least GitLab Enterprise Edition 10.0 for
-  basic Geo features, or latest version for a better experience.
-- You should make sure that all nodes run the same GitLab version.
+  basic Geo features, or latest version for a better experience
+- You should make sure that all nodes run the same GitLab version
 - Geo requires PostgreSQL 9.6 and Git 2.9 in addition to GitLab's usual
   [minimum requirements][install-requirements]
-- Using Geo in combination with High Availability is considered **GA** in GitLab Enterprise Edition 10.4
+- Using Geo in combination with High Availability (HA) is considered **Generally Available** (GA) in GitLab Enterprise Edition 10.4
 
 >**Note:**
 Geo changes significantly from release to release. Upgrades **are**
@@ -213,11 +213,9 @@ extra limitations may be in place.
 
 ### Limitations on replication
 
-Only the following items are replicated to the secondary. Any data not on this
-list will not be available on the secondary, and failing over without manually
-replicating it will cause the data to be **lost**:
+Only the following items are replicated to the secondary. Data not on this list is unavailable on the secondary. Failing over without manually replicating it will cause the data to be **lost**:
 
-- All database content (e.g., snippets, epics, issues, merge requests, groups, project metadata, etc)
+- All database content (e.g. snippets, epics, issues, merge requests, groups, project metadata, etc)
 - Project repositories
 - Project wiki repositories
 - User uploads (e.g. attachments to issues, merge requests and epics, avatars, etc)