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[Ada] Internal clean up for N_Pragma nodes

From: Arnaud Charlet <charlet at adacore dot com>
To: gcc-patches at gcc dot gnu dot org
Cc: Robert Dewar <dewar at adacore dot com>
Date: Wed, 6 Feb 2013 05:05:22 -0500
Subject: [Ada] Internal clean up for N_Pragma nodes

The specification for N_Pragma nodes requires that all pragma arguments
by represented by N_Pragma_Associatin nodes, but in several cases naked
expressions appeared. This patch corrects this irregularity, and also
cleans up the format of Make_Pragma calls throughout these files. This
was noticed during some new development, but does not as far as is known
affect any current functionality. It is only a latent bug, so no test
is needed.

Tested on x86_64-pc-linux-gnu, committed on trunk

2013-02-06  Robert Dewar  <dewar@adacore.com>

	* exp_prag.adb, sem_ch3.adb, exp_attr.adb, sem_prag.adb, sem_ch6.adb,
	exp_intr.adb, exp_dist.adb, sem_ch13.adb: Internal clean up for
	N_Pragma nodes.

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