2011-08-02  Robert Dewar  <dewar@adacore.com>

	* sem_ch3.adb, exp_atag.ads, get_scos.adb, get_scos.ads,
	exp_disp.adb, lib-xref.adb, lib-xref.ads: Update comments.
	Minor reformatting.

From-SVN: r177169