Fix build errors

Author: jeff-allen-mongo

source/tutorial/getting-started.txt

@@ -32,7 +32,7 @@ examples in the shell above.
       :tabid: example-1
 
       Switch Database
-      ~~~~~~~~~~~~~~~
+      ---------------
 
       Within the :ref:`shell <mongo-web-shell>`, ``db`` refers to
       your current database. Type ``db`` to display the current
@@ -69,7 +69,7 @@ examples in the shell above.
       :tabid: example-2
 
       Populate a Collection (Insert)
-      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+      ------------------------------
 
       MongoDB stores documents in :doc:`collections
       </core/databases-and-collections>`. Collections are analogous to
@@ -160,7 +160,7 @@ examples in the shell above.
       :tabid: example-3
 
       Select All Documents
-      ~~~~~~~~~~~~~~~~~~~~
+      --------------------
 
       To select the documents from a collection, you can use the
       :method:`db.collection.find()` method. To select all documents
@@ -179,7 +179,7 @@ examples in the shell above.
       :tabid: example-4
 
       Filter Data with Comparison Operators
-      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+      -------------------------------------
 
       For an equality match (``<field>`` equals ``<value>``),
       specify ``<field>: <value>`` in the :ref:`query filter
@@ -227,7 +227,7 @@ examples in the shell above.
       :tabid: example-5
 
       Specify Fields to Return (Projection)
-      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+      -------------------------------------
 
       To specify fields to return, pass a projection document to the
       :method:`db.collection.find(\<query document\>, \<projection
@@ -260,17 +260,17 @@ examples in the shell above.
       :tabid: example-6
 
       Aggregate Data (:pipeline:`$group`)
-      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+      -----------------------------------
 
       You can use aggregation to group values from multiple documents
       together and return a single result. Aggregation in MongoDB
       is performed with an :ref:`aggregation pipeline
       <aggregation-framework>`.
 
-      While :method:`find()` operations are useful for data
-      retrieval, the aggregation pipeline allows you to manipulate
-      data, perform calculations, and write more expressive queries
-      than simple :ref:`CRUD operations <crud>`.
+      While :method:`~db.collection.find()` operations are useful for
+      data retrieval, the aggregation pipeline allows you to manipulate
+      data, perform calculations, and write more expressive queries than
+      simple :ref:`CRUD operations <crud>`.
 
       In the :ref:`shell <mongo-web-shell>`, run the following
       aggregation pipeline to count the number of occurrences