I did:
> 2023-09-04 Bruno Haible <br...@clisp.org>
>
> string-buffer tests: Fix a gcc -Wformat warning.
> * tests/test-string-buffer.c: Don't assume that wint_t has the same size
> as 'int'.
Oops, that doesn't even compile. Fix:
2023-09-04 Bruno Haible <br...@clisp.org>
string-buffer tests: Fix a compilation error (regression from today).
* tests/test-string-buffer.c: Include <wchar.h>.
diff --git a/tests/test-string-buffer.c b/tests/test-string-buffer.c
index 1c9181d838..e5c2c5f918 100644
--- a/tests/test-string-buffer.c
+++ b/tests/test-string-buffer.c
@@ -21,6 +21,7 @@
#include "string-buffer.h"
#include <string.h>
+#include <wchar.h>
#include "macros.h"
