havelib: Fix 'configure --help' output

[Bruno Haible]

The --help output of gettext's configure contains these lines:
$ ./configure --help | grep libuni
  --with-included-libunistring  use the libunistring parts included here
  --with-libunistring-prefix[=DIR]  search for PACKLIBS in DIR/include and 
DIR/lib
  --without-libunistring-prefix     don't search for PACKLIBS in includedir and 
libdir

The reference to PACKLIBS is a bug; the correct output ought to be:
  --with-included-libunistring  use the libunistring parts included here
  --with-libunistring-prefix[=DIR]  search for libunistring in DIR/include and 
DIR/lib
  --without-libunistring-prefix     don't search for libunistring in includedir 
and libdir

This patch fixes it. Apparently the bug dates back to 2008.


2022-07-04  Bruno Haible  <bruno@clisp.org>

        havelib: Fix 'configure --help' output.
        * m4/lib-link.m4 (AC_LIB_LINKFLAGS_BODY): Fix m4 quoting bug.

diff --git a/m4/lib-link.m4 b/m4/lib-link.m4
index ed5186afb4..3b75bcd0de 100644
--- a/m4/lib-link.m4
+++ b/m4/lib-link.m4
@@ -1,4 +1,4 @@
-# lib-link.m4 serial 32
+# lib-link.m4 serial 33
 dnl Copyright (C) 2001-2022 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -196,8 +196,8 @@ AC_DEFUN([AC_LIB_LINKFLAGS_BODY],
     eval additional_libdir3=\"$exec_prefix/$acl_libdirstem3\"
   ])
   AC_ARG_WITH(PACK[-prefix],
-[[  --with-]]PACK[[-prefix[=DIR]  search for ]PACKLIBS[ in DIR/include and 
DIR/lib
-  --without-]]PACK[[-prefix     don't search for ]PACKLIBS[ in includedir and 
libdir]],
+[[  --with-]]PACK[[-prefix[=DIR]  search for ]]PACKLIBS[[ in DIR/include and 
DIR/lib
+  --without-]]PACK[[-prefix     don't search for ]]PACKLIBS[[ in includedir 
and libdir]],
 [
     if test "X$withval" = "Xno"; then
       use_additional=no