remove near-duplicate message

git-svn-id: https://svn.r-project.org/R/branches/R-2-9-branch@49227 00db46b3-68df-0310-9c12-caf00c1e9a41

m4/gettext-lib.m4

@@ -25,7 +25,8 @@ with_gnu_ld=$acl_cv_prog_gnu_ld
 dnl From libtool-1.4. Sets the variable LD.
 AC_DEFUN([AC_LIB_PROG_LD],
 [AC_ARG_WITH(gnu-ld,
-[  --with-gnu-ld           assume the C compiler uses GNU ld [default=no]],
+    [AS_HELP_STRING([--with-gnu-ld],
+	[assume the C compiler uses GNU ld @<:@default=no@:>@])],
 test "$withval" = no || with_gnu_ld=yes, with_gnu_ld=no)
 AC_REQUIRE([AC_PROG_CC])dnl
 AC_REQUIRE([AC_CANONICAL_HOST])dnl