tests/functional: fix formatting of exception args

The catch-all exception handler forgot the placeholder for
the exception details.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250829142616.2633254-3-berrange@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

diff --git a/tests/functional/qemu_test/asset.py b/tests/functional/qemu_test/asset.py
index b5a6136d365523c69cac129138c48f1f32af8f80..5c74adf2241021f9f68ed6645baa7766c2f79759 100644 (file)
--- a/tests/functional/qemu_test/asset.py
+++ b/tests/functional/qemu_test/asset.py
@@ -173,7 +173,7 @@ class Asset:
                 continue
             except Exception as e:
                 tmp_cache_file.unlink()
-                raise AssetError(self, "Unable to download: " % e)
+                raise AssetError(self, "Unable to download: %s" % e)
 
         if not os.path.exists(tmp_cache_file):
             raise AssetError(self, "Download retries exceeded", transient=True)