2013-04-11  Ben Brosgol  <brosgol@adacore.com>

	* gnat_ugn.texi: Minor clean ups.

2013-04-11  Robert Dewar  <dewar@adacore.com>

	* nlists.ads, nlists.adb, treepr.adb, treepr.ads: Move debugging
	function p from Nlists to Treepr.

2013-04-11  Ed Schonberg  <schonberg@adacore.com>

	* sem_disp.adb (Check_Dispatching_Context): If the context is
	a contract for a null procedure defer error reporting until
	postcondition body is created.
	* exp_ch13.adb (Expand_N_Freeze_Entity): If the entity is a
	null procedure, complete the analysis of its contracts so that
	calls within classwide conditions are properly rewritten as
	dispatching calls.

From-SVN: r197794