sfn_scan.adb, [...]: Fix comment typos.

sfn_scan.adb, [...]: Fix comment typos.

gcc/ada/
	* sfn_scan.adb, sfn_scan.ads, sinfo.ads,
	sinput-d.ads, sinput-l.adb, sinput-l.ads, sinput.ads,
	snames.ads, sprint.adb, stand.ads, stringt.ads,
	styleg.adb, styleg.ads, stylesw.adb, stylesw.ads,
	switch.ads, sysdep.c, table.adb, table.ads,
	targparm.ads, tb-gcc.c, tbuild.ads, tracebak.c,
	trans.c, tree_io.adb, treepr.adb, types.adb, types.ads,
	uintp.adb, uintp.ads, utils.c, utils2.c, validsw.ads,
	vms_conv.adb, vms_conv.ads, vms_data.ads, widechar.adb,
	widechar.ads, xeinfo.adb, xgnatugn.adb, xr_tabls.adb,
	xr_tabls.ads, xref_lib.adb, xref_lib.ads, xsinfo.adb:
	Fix comment typos.

From-SVN: r134243