2013-04-23  Robert Dewar  <dewar@adacore.com>

	* exp_prag.adb (Expand_Pragma_Check): Check for Assert rather
	than Assertion.
	* sem_prag.adb (Is_Valid_Assertion_Kind): Moved to spec
	(Effective_Name): New function (Analyze_Pragma, case Check):
	Disallow [Statement_]Assertions (Check_Kind): Implement
	Statement_Assertions (Check_Applicable_Policy): Use Effective_Name
	(Is_Valid_Assertion_Kind): Allow Statement_Assertions.
	* sem_prag.ads (Is_Valid_Assertion_Kind): Moved here from body
	(Effective_Name): New function.
	* sem_res.adb: Minor reformatting.
	* snames.ads-tmpl (Name_Statement_Assertions): New entry.
	* gnat_rm.texi: Add documentation of new assertion kind
	Statement_Assertions.

From-SVN: r198187