gnat_ugn.texi (Conventions): List environment variables and metasyntactic variables.

* gnat_ugn.texi (Conventions): List environment variables and
metasyntactic variables.
(Compiling Programs): Fix notation of metasyntactic variables.
Add @file where appropriate.  Use @file for file extensions,
@samp for strings.
* gnat_rm.texi, gnat_ugn.texi: Where appropriate, use @samp
instead of @file, @env instead of @code.

From-SVN: r132641

gcc/ada/ChangeLog

+2008-02-25  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>
+
+	* gnat_ugn.texi (Conventions): List environment variables and
+	metasyntactic variables.
+	(Compiling Programs): Fix notation of metasyntactic variables.
+	Add @file where appropriate.  Use @file for file extensions,
+	@samp for strings.
+	* gnat_rm.texi, gnat_ugn.texi: Where appropriate, use @samp
+	instead of @file, @env instead of @code.
+
 2008-02-24  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>
 
 	PR documentation/15479

gcc/ada/gnat_rm.texi

@@ -597,10 +597,11 @@ and @code{classes}.
 @code{Option flags}
 
 @item
-@file{File Names}, @samp{button names}, and @samp{field names}.
+@file{File names}, @samp{button names}, and @samp{field names}.
 
 @item
-@code{Variables}.
+@code{Variables}, @env{environment variables}, and @var{metasyntactic
+variables}.
 
 @item
 @emph{Emphasis}.