Problem: Minor style issues with PR

Solution: Addressing comments

bigchaindb/elections/election.py

@@ -97,7 +97,7 @@ class Election(Transaction):
             :param current_transactions: (list) A list of transactions to be validated along with the election
 
         Returns:
-            ValidatorElection object
+            Election: a Election object or an object of the derived Election subclass.
 
         Raises:
             ValidationError: If the election is invalid

bigchaindb/elections/vote.py

@@ -30,7 +30,7 @@ class Vote(Transaction):
             bigchain (BigchainDB): an instantiated bigchaindb.lib.BigchainDB object.
 
         Returns:
-            Vote object
+            Vote: a Vote object
 
         Raises:
             ValidationError: If the election vote is invalid

tests/tendermint/test_core.py

@@ -366,8 +366,8 @@ def test_end_block_return_validator_updates(b, init_chain_request):
     resp = app.end_block(RequestEndBlock(height=99))
     assert resp.validator_updates[0] == encode_validator(validator)
 
-    updates = b.is_approved()
-    assert updates == []
+    updates = b.approved_update()
+    assert not updates
 
 
 def test_store_pre_commit_state_in_end_block(b, alice, init_chain_request):

tests/tendermint/test_lib.py

@@ -164,11 +164,11 @@ def test_validator_updates(b, validator_pub_key):
                         'update_id': VALIDATOR_UPDATE_ID}
     query.store_validator_update(b.connection, validator_update)
 
-    updates = b.is_approved()
-    assert updates == [validator_update['validator']]
+    updates = b.approved_updates()
+    assert updates == validator_update['validator']
 
     b.delete_validator_update()
-    assert b.is_approved() == []
+    assert not b.approved_updates()
 
 
 @pytest.mark.bdb