* exp_ch3.adb, gnat1drv.adb, namet.adb, namet.ads, sem_aggr.adb,
sem_ch2.adb, sem_ch4.adb: Minor reformatting.
* sem_res.adb (Resolve_Entity_Name): Suppress spurious error on read of
out parameter when in Ada_83 mode, the oarameter is of a composite
type, and it appears as the prefix of an attribute.