diff --git a/superset/config.py b/superset/config.py
index 630fbef90..45ea6e3cf 100644
--- a/superset/config.py
+++ b/superset/config.py
@@ -808,8 +808,8 @@ SIP_15_ENABLED = True
 SIP_15_GRACE_PERIOD_END: Optional[date] = None  # exclusive
 SIP_15_DEFAULT_TIME_RANGE_ENDPOINTS = ["unknown", "inclusive"]
 SIP_15_TOAST_MESSAGE = (
-    "Action Required: Preview then save your chart using the"
-    'new time range endpoints <a target="_blank" href="{url}"'
+    "Action Required: Preview then save your chart using the "
+    'new time range endpoints <a target="_blank" href="{url}" '
     'class="alert-link">here</a>.'
 )