Consistently punctuate lists

Author: p

source/introduction.txt

@@ -57,7 +57,7 @@ In addition to collections, MongoDB supports:
 
 - Read-only :doc:`/core/views` (Starting in MongoDB 3.4)
 
-- :doc:`/core/materialized-views` (Starting in MongoDB 4.2)
+- :doc:`/core/materialized-views` (Starting in MongoDB 4.2).
 
 Key Features
 ------------
@@ -92,7 +92,7 @@ MongoDB's replication facility, called :doc:`replica set
 
 - *automatic* failover
 
-- data redundancy
+- data redundancy.
 
 A :doc:`replica set </replication>` is a group of
 MongoDB servers that maintain the same data set, providing redundancy
@@ -123,7 +123,7 @@ MongoDB supports :doc:`multiple storage engines
 - :doc:`/core/wiredtiger` (including support for
   :doc:`/core/security-encryption-at-rest`)
 
-- :doc:`/core/inmemory`
+- :doc:`/core/inmemory`.
 
 In addition, MongoDB provides pluggable storage engine API that allows
 third parties to develop storage engines for MongoDB.