trivial: fix typos for mongodump/backup text

Author: kay-kim

source/core/backups.txt

@@ -82,7 +82,7 @@ Use Cases
 :program:`mongodump` and :program:`mongorestore` are simple and
 efficient for backing up small MongoDB deployments, for partial backup
 and restores based on a query, syncing from production to staging or
-development environment, or changing the storage engine of a standalone.
+development environments, or changing the storage engine of a standalone.
 
 However, these tools can be problematic for capturing backups of larger
 systems, sharded clusters, or replica sets. For alternatives, see
@@ -97,6 +97,13 @@ Data Exclusion
 backup data and does not include index data. :program:`mongorestore` or
 :program:`mongod` must then rebuild the indexes after restoring data.
 
+Data Compression Handling
+~~~~~~~~~~~~~~~~~~~~~~~~~
+
+When run against a :program:`mongod` instance that uses the
+:doc:`WiredTiger </core/wiredtiger>` storage engine,
+:program:`mongodump` outputs uncompressed data.
+
 Performance
 ~~~~~~~~~~~
 

source/reference/program/mongodump.txt

@@ -24,7 +24,7 @@ either :program:`mongod` or :program:`mongos` instances.
 :program:`mongodump` can be a part of a :ref:`backup strategy
 <backup-with-mongodump>` with :program:`mongorestore` for partial
 backups based on a query, syncing from production to staging or
-development environment, or changing the storage engine of a
+development environments, or changing the storage engine of a
 standalone. However, the use of :program:`mongodump` and
 :program:`mongorestore` as a backup strategy can be problematic for
 sharded clusters and replica sets.
@@ -75,7 +75,7 @@ Data Compression Handling
 
 When run against a :program:`mongod` instance that uses the
 :doc:`WiredTiger </core/wiredtiger>` storage engine,
-:program:`mongodump` outputs uncompress data.
+:program:`mongodump` outputs uncompressed data.
 
 Working Set
 ~~~~~~~~~~~