Merge "Fix many spell glitches in docstrings and comments"

diff --cc lib/sqlalchemy/orm/loading.py
Simple merge

diff --cc lib/sqlalchemy/orm/mapper.py
Simple merge

diff --cc lib/sqlalchemy/orm/persistence.py
Simple merge

diff --cc lib/sqlalchemy/orm/query.py
Simple merge

diff --cc lib/sqlalchemy/orm/session.py
Simple merge

diff --cc lib/sqlalchemy/sql/selectable.py
Simple merge

diff --cc lib/sqlalchemy/util/compat.py
Simple merge

diff --cc lib/sqlalchemy/util/queue.py
Simple merge