[gnome-session] [build] Do not use [] but @<:@ and @:>@ for default values in configure

[Vincent Untz <vuntz src gnome org>]

commit c3611b2c7ba8e80f56ce5750bec5f748dfb9b032
Author: Vincent Untz <vuntz gnome org>
Date:   Tue Mar 9 13:36:26 2010 +0100

    [build] Do not use [] but @<:@ and @:>@ for default values in configure

 configure.in |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/configure.in b/configure.in
index 75a665b..a1ecd81 100644
--- a/configure.in
+++ b/configure.in
@@ -29,7 +29,7 @@ GNOME_COMPILE_WARNINGS(maximum)
 
 AC_ARG_ENABLE(deprecations,
               [AC_HELP_STRING([--enable-deprecations],
-                              [warn about deprecated usages [default=no]])],,
+                              [warn about deprecated usages @<:@default=no@:>@])],,
               [enable_deprecations=no])
 
 if test "x$enable_deprecations" = "xyes"; then
@@ -97,7 +97,7 @@ dnl Option to enable the splash screen
 dnl ====================================================================
 AC_ARG_ENABLE(splash,
               [AC_HELP_STRING([--enable-splash],
-                              [enable splash screen [default=no]])],,
+                              [enable splash screen @<:@default=no@:>@])],,
               [enable_splash=no])
 
 AM_CONDITIONAL(ENABLE_SPLASH, test x$enable_splash = xyes)