2009-04-10  Thomas Quinot  <quinot@adacore.com>

	* sem_ch6.ads (Check_Subtype_Conformant): Add ??? comment for
	undocumented formal.
	Minor reformatting

	* a-direio.ads: Fix typo in comment

	* sem_ch3.adb, g-dirope.adb, sem_type.adb, sem_ch12.adb, sem_case.adb,
	errout.adb, sem_ch4.adb, sem_ch11.adb, exp_dist.adb, sem_ch13.adb:
	Use uniform phrasing for comment at start of subprogram body.

	* xsnamest.adb: Add note to explain why we use specific names for the
	newly generated files instead of generating snames.{ads,adb,h} directly

From-SVN: r145918