Fixed #20453 -- inspectdb test failure on Oracle

django/db/backends/oracle/introspection.py

@@ -50,6 +50,7 @@ class DatabaseIntrospection(BaseDatabaseIntrospection):
         description = []
         for desc in cursor.description:
             name = force_text(desc[0]) # cx_Oracle always returns a 'str' on both Python 2 and 3
+            name = name % {} # cx_Oracle, for some reason, doubles percent signs.
             description.append(FieldInfo(*(name.lower(),) + desc[1:]))
         return description