From 17f4b4154a8b76b3a23016a008097f9afac4f433 Mon Sep 17 00:00:00 2001
From: FedeMiorelli <FedeMiorelli@users.noreply.github.com>
Date: Mon, 8 May 2017 16:29:22 +0200
Subject: [PATCH] Missing return in _num_to_string()

Added a missing return statement that caused "None" strings to be displayed with LogFormatter.
---
 lib/matplotlib/ticker.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/matplotlib/ticker.py b/lib/matplotlib/ticker.py
index ae16a696b500..cccdae2dbb5d 100644
--- a/lib/matplotlib/ticker.py
+++ b/lib/matplotlib/ticker.py
@@ -975,7 +975,8 @@ def _num_to_string(self, x, vmin, vmax):
             s = '%1.0e' % x
         else:
             s = self.pprint_val(x, vmax - vmin)
-
+        return s
+   
     def __call__(self, x, pos=None):
         """
         Return the format for tick val `x`.