PYTHON-2790 Fix doctest issues in raw_bson

Author: behackett

bson/raw_bson.py

@@ -19,36 +19,33 @@
 
 Example: Moving a document between different databases/collections
 
-.. testsetup::
-  from pymongo import MongoClient
-  client = MongoClient(document_class=RawBSONDocument)
-  client.drop_database('db')
-  client.drop_database('replica_db')
-
 .. doctest::
 
   >>> import bson
   >>> from pymongo import MongoClient
   >>> from bson.raw_bson import RawBSONDocument
   >>> client = MongoClient(document_class=RawBSONDocument)
+  >>> client.drop_database('db')
+  >>> client.drop_database('replica_db')
   >>> db = client.db
   >>> result = db.test.insert_many([{'a': 1},
   ...                               {'b': 1},
   ...                               {'c': 1},
   ...                               {'d': 1}])
   >>> replica_db = client.replica_db
   >>> for doc in db.test.find():
-  ...    print(f"raw document: {doc.raw}")
-  ...    print(f"decoded document: {bson.decode(doc.raw)}")
+  ...    print("raw document: %r" % (doc.raw,))
   ...    result = replica_db.test.insert_one(doc)
-  raw document: b'...'
-  decoded document: {'_id': ObjectId('...'), 'a': 1}
-  raw document: b'...'
-  decoded document: {'_id': ObjectId('...'), 'b': 1}
-  raw document: b'...'
-  decoded document: {'_id': ObjectId('...'), 'c': 1}
-  raw document: b'...'
-  decoded document: {'_id': ObjectId('...'), 'd': 1}
+  raw document: '...'
+  raw document: '...'
+  raw document: '...'
+  raw document: '...'
+  >>> for doc in replica_db.test.find(projection={'_id': 0}):
+  ...     print("decoded document: %r" % (bson.decode(doc.raw),))
+  decoded document: {u'a': 1}
+  decoded document: {u'b': 1}
+  decoded document: {u'c': 1}
+  decoded document: {u'd': 1}
 
 For use cases like moving documents across different databases or writing binary
 blobs to disk, using raw BSON documents provides better speed and avoids the