2017-11-08  Piotr Trojanek  <trojanek@adacore.com>

	* spark_xrefs.ads (SPARK_Xref_Record): Replace file and scope indices
	with Entity_Id of the reference.
	* spark_xrefs.adb (dspark): Adapt pretty-printing routine.
	* lib-xref-spark_specific.adb (Add_SPARK_Xrefs): Store Entity_Id of the
	reference, not the file and scope indices.

2017-11-08  Arnaud Charlet  <charlet@adacore.com>

	* errout.ads (Current_Node): New.
	* errout.adb (Error_Msg): Use Current_Node.
	* par-ch6.adb, par-ch7.adb, par-ch9.adb, par-util.adb: Set Current_Node
	when relevant.
	* style.adb: Call Error_Msg_N when possible.

From-SVN: r254543