Merge branch 'DRIVERS-2789-sessions' of github.com:blink1073/specific…

…ations into DRIVERS-2789-sessions

source/sessions/driver-sessions.md

@@ -826,7 +826,6 @@ checking this would require overhead that doesn't provide any clear benefit.
 
 A previous draft proposed that ClientSession would be a MongoClient-like object added to the object hierarchy:
 
-````
 ```javascript
 session = client.startSession(...)
 database = session.getDatabase(...) // database is associated with session
@@ -835,7 +834,6 @@ collection = database.getCollection(...) // collection is associated with sessio
 collection.insertOne({})
 session.endSession()
 ```
-````
 
 The central feature of this design is that a MongoCollection (or database, or perhaps a GridFS object) is associated
 with a session, which is then an implied parameter to any operations executed using that MongoCollection.
@@ -848,7 +846,6 @@ parent MongoDatabase is created.
 
 Instead, we require users to pass session as a parameter to each function:
 
-````
 ```javascript
 session = client.startSession(...)
 database = client.getDatabase(...)
@@ -857,7 +854,6 @@ collection = database.getCollection(...)
 collection.insertOne(session, {})
 session.endSession()
 ```
-````
 
 ### Why does a network error cause the `ServerSession` to be discarded from the pool?