Add missing space in repr of the sessionmaker class
Add missing space in repr of the sessionmaker class

The missing space was driving me nuts.
monetate/sqlalchemy,sqlalchemy/sqlalchemy,monetate/sqlalchemy,graingert/sqlalchemy,j5int/sqlalchemy,wujuguang/sqlalchemy,wujuguang/sqlalchemy,zzzeek/sqlalchemy,j5int/sqlalchemy,graingert/sqlalchemy