From e9dfefb28adce955a77b5b5fa5cf9fb35cfe2652 Mon Sep 17 00:00:00 2001
From: Maxime Beauchemin <maximebeauchemin@gmail.com>
Date: Fri, 12 Jan 2018 15:10:17 -0800
Subject: [PATCH] [line chart] fix time shift color (#4202)

---
 superset/viz.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/superset/viz.py b/superset/viz.py
index 62e02ac9eacfe..e89dca921f13f 100644
--- a/superset/viz.py
+++ b/superset/viz.py
@@ -946,7 +946,7 @@ def to_series(self, df, classed='', title_suffix=''):
             if isinstance(series_title, string_types):
                 series_title += title_suffix
             elif title_suffix and isinstance(series_title, (list, tuple)):
-                series_title = series_title + (title_suffix,)
+                series_title = text_type(series_title[-1]) + title_suffix
 
             values = []
             for ds in df.index: