[gtk+] Make formatting of configure options consistent

[Matthias Clasen <matthiasc src gnome org>]

commit a38309474d90fd06b940f7823bab6b9bd6b79f26
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Jan 24 06:31:07 2013 -0500

    Make formatting of configure options consistent
    
    Some options had double [], which can be avoided by
    judicious use of opt="plain" attributes.

 docs/reference/gtk/building.sgml |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/docs/reference/gtk/building.sgml b/docs/reference/gtk/building.sgml
index 542782c..4e44a47 100644
--- a/docs/reference/gtk/building.sgml
+++ b/docs/reference/gtk/building.sgml
@@ -326,7 +326,7 @@ How to compile GTK+ itself
           </group>
           <sbr/>
           <group>
-            <arg>--enable-debug=[no/minimum/yes]</arg>
+            <arg choice="plain">--enable-debug=[no/minimum/yes]</arg>
           </group>
           <sbr/>
           <group>
@@ -395,7 +395,7 @@ How to compile GTK+ itself
           </group>
           <sbr/>
           <group>
-            <arg>--enable-introspection=[no/auto/yes]</arg>
+            <arg choice="plain">--enable-introspection=[no/auto/yes]</arg>
           </group>
           <sbr/>
           <group>