Adding upstream version 9.7.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

lib/quote.h

@@ -0,0 +1,56 @@
+/* quote.h - prototypes for quote.c
+
+   Copyright (C) 1998-2001, 2003, 2009-2025 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef QUOTE_H_
+#define QUOTE_H_ 1
+
+#include <stddef.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/* The quoting options used by quote_n and quote.  Its type is incomplete,
+   so it's useful only in expressions like '&quote_quoting_options'.  */
+extern struct quoting_options quote_quoting_options;
+
+/* Return an unambiguous printable representation of ARG (of size
+   ARGSIZE), allocated in slot N, suitable for diagnostics.  If
+   ARGSIZE is SIZE_MAX, use the string length of the argument for
+   ARGSIZE.  */
+char const *quote_n_mem (int n, char const *arg, size_t argsize);
+
+/* Return an unambiguous printable representation of ARG (of size
+   ARGSIZE), suitable for diagnostics.  If ARGSIZE is SIZE_MAX, use
+   the string length of the argument for ARGSIZE.  */
+char const *quote_mem (char const *arg, size_t argsize);
+
+/* Return an unambiguous printable representation of ARG, allocated in
+   slot N, suitable for diagnostics.  */
+char const *quote_n (int n, char const *arg);
+
+/* Return an unambiguous printable representation of ARG, suitable for
+   diagnostics.  */
+char const *quote (char const *arg);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* !QUOTE_H_ */