Typo fix

Author: marians

source/core/write-operations.txt

@@ -348,7 +348,7 @@ Padding Factor
 
 
 If an update operation does not cause the document to increase in
-size, MongoDB can apply the update in-place in-place. Some updates
+size, MongoDB can apply the update in-place. Some updates
 change the size of the document, for example using the
 :operator:`$push` operator to append a sub-document to an array can
 cause the top level document to grow beyond its allocated space.