fix usage problem on **kwargs params

jedi/api.py

@@ -411,8 +411,9 @@ class Script(object):
         """
         user_stmt = self._parser.user_stmt
         definitions, search_name = self._goto(add_import_name=True)
-        if isinstance(user_stmt, pr.Statement) \
-                and self.pos < user_stmt.get_commands()[0].start_pos:
+        if isinstance(user_stmt, pr.Statement):
+            c = user_stmt.get_commands()[0]
+            if not isinstance(c, unicode) and self.pos < c.start_pos:
                 # the search_name might be before `=`
                 definitions = [v for v in user_stmt.set_vars
                                if unicode(v.names[-1]) == search_name]

test/completion/renaming.py

@@ -203,3 +203,10 @@ class TestProperty:
     def b(self):
         #< 13 (-5,8), (0,13)
         self.rw_prop
+
+# -----------------
+# *args, **kwargs
+# -----------------
+#< 11 (1,11), (0,8)
+def f(**kwargs):
+    return kwargs