2017-01-12  Hristian Kirtchev  <kirtchev@adacore.com>

	* exp_ch6.adb: Minor reformatting.
	* spark_xrefs.ads: minor cleanup of comments for SPARK xrefs

2017-01-12  Bob Duff  <duff@adacore.com>

	* binde.adb (Forced): New reason for a dependence.
	(Force_Elab_Order): Implementation of the new switch.
	* binde.ads: Minor comment fixes.
	* bindusg.adb: Add -f switch. Apparently, there was an -f switch
	long ago that is no longer supported; removed comment about that.
	* opt.ads (Force_Elab_Order_File): Name of file specified for
	-f switch.
	* switch-b.adb: Parse -f switch.

From-SVN: r244355