DOCS-14610-complete-sentences

Author: ianf-mongodb

source/tutorial/update-documents-with-aggregation-pipeline.txt

@@ -60,9 +60,9 @@ aggregation pipeline to update the document with ``_id: 3``:
 Specifically, the pipeline consists of a :pipeline:`$set` stage
 which adds the ``test3`` field (and sets its value to ``98``) to the
 document and sets the ``modified`` field to the current datetime.
-For the current datetime, the operation uses the aggregation
-variable :variable:`NOW` for the (to access the variable, prefix with ``$$``
-and enclose in quotes).
+The operation uses the aggregation variable :variable:`NOW` for the 
+current datetime. To access the variable, prefix with  ``$$`` and enclose 
+in quotes.
 
 To verify the update, you can query the collection:
 
@@ -120,14 +120,14 @@ Specifically, the pipeline consists of:
   :expression:`$mergeObjects` expression to set default values for
   the ``quiz1``, ``quiz2``, ``test1`` and ``test2`` fields. The
   aggregation variable :variable:`ROOT` refers to the current
-  document being modified (to access the variable, prefix with
-  ``$$`` and enclose in quotes). The current document fields will
+  document being modified. To access the variable, prefix with
+  ``$$`` and enclose in quotes. The current document fields will
   override the default values.
 
 - a :pipeline:`$set` stage to update the ``modified`` field to the
-  current datetime. For the current datetime, the operation uses the
-  aggregation variable :variable:`NOW` for the (to access the
-  variable, prefix with ``$$`` and enclose in quotes).
+  current datetime. The operation uses the aggregation variable 
+  :variable:`NOW` for the current datetime. To access the variable, 
+  prefix with ``$$`` and enclose in quotes.
 
 To verify the update, you can query the collection:
 
@@ -192,9 +192,9 @@ Specifically, the pipeline consists of:
   of the ``tests`` array elements and to update the ``modified``
   field to the current datetime. To calculate the truncated average,
   the stage uses the :group:`$avg` and :expression:`$trunc`
-  expressions. For the current datetime, the operation uses the
-  aggregation variable :variable:`NOW` for the (to access the
-  variable, prefix with ``$$`` and enclose in quotes)
+  expressions. The operation uses the aggregation variable 
+  :variable:`NOW` for the current datetime. To access the variable,
+  prefix with ``$$`` and enclose in quotes.
 
 - a :pipeline:`$set` stage to add the ``grade`` field based on the
   ``average`` using the :expression:`$switch` expression.