[gcc r12-6728] Update on riscv -Wformat-diag string.

[Martin Liska <marxin@gcc.gnu.org>]

https://gcc.gnu.org/g:fdf31ae25f66cd486e655d7ebda36826025b9d0e

commit r12-6728-gfdf31ae25f66cd486e655d7ebda36826025b9d0e
Author: Martin Liska <mliska@suse.cz>
Date:   Wed Jan 19 10:32:13 2022 +0100

    Update on riscv -Wformat-diag string.
    
    gcc/ChangeLog:
    
            * config/riscv/riscv.cc (riscv_handle_type_attribute):
            Update one -Wformat-diag string in warning message.

Diff:
---
 gcc/config/riscv/riscv.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/gcc/config/riscv/riscv.cc b/gcc/config/riscv/riscv.cc
index 8314864d5e7..6885b4bbad2 100644
--- a/gcc/config/riscv/riscv.cc
+++ b/gcc/config/riscv/riscv.cc
@@ -3309,8 +3309,8 @@ riscv_handle_type_attribute (tree *node ATTRIBUTE_UNUSED, tree name, tree args,
 	      && strcmp (string, "machine"))
 	    {
 	      warning (OPT_Wattributes,
-		       "argument to %qE attribute is not %<user%>, %<supervisor%>, "
-		       "or %<machine%>", name);
+		       "argument to %qE attribute is not %<\"user\"%>, %<\"supervisor\"%>, "
+		       "or %<\"machine\"%>", name);
 	      *no_add_attrs = true;
 	    }
 	}