Fixed #12140 -- Fixed http.urlencode result for empty lists

Thanks aneil for the report and the initial patch.

1 files changed, 1 insertions, 1 deletions

diff --git a/django/utils/http.py b/django/utils/http.py
index dbd18d8ff0..87db284416 100644
--- a/django/utils/http.py
+++ b/django/utils/http.py
@@ -71,7 +71,7 @@ def urlencode(query, doseq=0):
         query = query.items()
     return urllib.urlencode(
         [(smart_str(k),
-         isinstance(v, (list,tuple)) and [smart_str(i) for i in v] or smart_str(v))
+         [smart_str(i) for i in v] if isinstance(v, (list,tuple)) else smart_str(v))
             for k, v in query],
         doseq)