2013-04-24  Yannick Moy  <moy@adacore.com>

	* adabkend.adb, ali-util.adb, ali.adb, debug.adb,
	errout.adb, errout.ads, erroutc.adb, exp_ch3.adb, exp_ch4.adb,
	exp_ch6.adb, exp_ch7.adb, exp_dbug.adb, exp_util.adb,
	expander.adb, freeze.adb, gnat1drv.adb, lib-writ.adb,
	lib-writ.ads, lib-xref.adb, lib-xref.ads, opt.adb, opt.ads,
	restrict.adb, sem_aggr.adb, sem_attr.adb, sem_ch3.adb,
	sem_ch4.adb, sem_ch5.adb, sem_ch6.adb, sem_eval.adb, sem_prag.adb,
	sem_res.adb, sem_util.adb: Everything with name
	'Alfa' renamed in 'SPARK'. Update comments.
	Renaming of units with name 'Alfa', renamed with 'SPARK' instead.
	* exp_alfa.adb: renamed exp_spark.adb.
	* exp_alfa.ads: renamed exp_spark.ads.
	* get_alfa.adb: renamed get_spark_xrefs.adb.
	* get_alfa.ads: renamed get_spark_xrefs.ads.
	* lib-xref-alfa.adb: renamed lib-xref-spark_specific.adb.
	* put_alfa.adb: renamed put_spark_xrefs.adb.
	* put_alfa.ads: renamed put_spark_xrefs.ads.
	* alfa.adb: renamed spark_xrefs.adb.
	* alfa.ads: renamed spark_xrefs.ads.
	* alfa_test.adb: renamed spark_xrefs_test.adb.

From-SVN: r198234