DOCSP-44700-pre-split-chunks (#452) (#455)

* DOCSP-44700-pre-split-chunks

* *

* nit

* ED feedback

(cherry picked from commit feee23c)

Author: ajhuh-mdb

source/reference/api/start.txt

@@ -352,23 +352,16 @@ If the ``start`` request is successful, ``mongosync`` enters the
 Pre-Split Chunks
 ~~~~~~~~~~~~~~~~
 
-.. versionadded:: 1.1
-
-When ``mongosync`` syncs to a sharded cluster, it pre-splits chunks for
-sharded collections on the destination cluster.  This is supported in the
-following configurations:
-
-* Sync from a replica set to a sharded cluster.
-
-* Sync between sharded clusters that differ in the number of shards.
+When ``mongosync`` syncs to a sharded destination cluster, it pre-splits chunks 
+for sharded collections on the destination cluster. For each sharded collection, 
+``mongosync`` creates twice as many chunks as there are shards in the 
+destination cluster. 
 
 .. _c2c-shard-replica-sets:
 
 Shard Replica Sets 
 ~~~~~~~~~~~~~~~~~~
 
-.. versionadded:: 1.1
-
 Sync from a replica set to a sharded cluster requires the 
 ``sharding`` option. This option configures how ``mongosync`` shards
 collections.
@@ -381,8 +374,6 @@ Collections that are not listed in this array replicate as unsharded.
 Supporting Indexes
 ~~~~~~~~~~~~~~~~~~
 
-.. versionadded:: 1.1
-
 ``mongosync`` syncs indexes from the source cluster to the destination
 cluster.  But, when syncing from a replica set to a sharded cluster,
 ``mongosync`` may require an additional index to support the shard key,
@@ -424,8 +415,6 @@ collections.
 Rename During Sync
 ~~~~~~~~~~~~~~~~~~
 
-.. versionadded:: 1.1
-
 Collections listed in the ``sharding.shardingEntries`` array 
 when synced from a replica set to a sharded cluster 
 become sharded collections on the destination cluster.