[PATCH trivial] block.c: add newline for "Detected format" warning

[Michael Tokarev]

Add the forgotten trailing newline.

Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
---
 block.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/block.c b/block.c
index a18f052374..3d220d3955 100644
--- a/block.c
+++ b/block.c
@@ -7026,7 +7026,7 @@ void bdrv_img_create(const char *filename, const char 
*fmt,
             if (!backing_fmt) {
                 error_setg(&local_err,
                            "Backing file specified without backing format");
-                error_append_hint(&local_err, "Detected format of %s.",
+                error_append_hint(&local_err, "Detected format of %s.\n",
                                   bs->drv->format_name);
                 goto out;
             }
-- 
2.30.2