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[Ada] No trailing spaces in listings

From: Arnaud Charlet <charlet at adacore dot com>
To: gcc-patches at gcc dot gnu dot org
Cc: Vincent Celier <celier at adacore dot com>
Date: Thu, 13 Dec 2007 14:33:44 +0100
Subject: [Ada] No trailing spaces in listings

Tested on i686-linux, committed on trunk.

This is a small improvement/clean up: there is no more trailings spaces after
the line number in listings when the source line is empty.
The test for this is to compile with -gnatl a source with empty lines.
There should be no trailing space after the line number for these empty
lines.

2007-12-13  Vincent Celier  <celier@adacore.com>

	* errout.adb (Output_Source_Line): Do not keep a trailing space after
	the source line number if the source line is empty.

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