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

[Vincent Untz <vuntz src gnome org>]

commit 0b0ae9db0d10c19110506dea4dd82b4c8ffaa954
Author: Vincent Untz <vuntz gnome org>
Date:   Tue Mar 9 13:37:02 2010 +0100

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

 configure.in |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.in b/configure.in
index 788ae26..4cd99ab 100644
--- a/configure.in
+++ b/configure.in
@@ -64,7 +64,7 @@ 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