Make flush logic slightly clearer in tutorial.
Make flush logic slightly clearer in tutorial.

Improve the wording of how sessions commit changes.
graingert/sqlalchemy,zzzeek/sqlalchemy,graingert/sqlalchemy,j5int/sqlalchemy,j5int/sqlalchemy,wujuguang/sqlalchemy,monetate/sqlalchemy,wujuguang/sqlalchemy,sqlalchemy/sqlalchemy,monetate/sqlalchemy