gnat_rm.texi: Document that leading/trailing asterisks are now implied for the patter...

gnat_rm.texi: Document that leading/trailing asterisks are now implied for the pattern match...

2014-07-16  Robert Dewar  <dewar@adacore.com>

	* gnat_rm.texi: Document that leading/trailing asterisks are
	now implied for the pattern match string for pragma Warnings
	and Warning_As_Error.
	* sem_prag.adb (Acquire_Warning_Match_String): New procedure.
	(Analyze_Pragma, case Warning_As_Error): Call
	Acquire_Warning_Match_String.
	(Analyze_Pragma, case Warnings): Call Acquire_Warning_Match_String.

From-SVN: r212651