From 27f03cecd5b193c9f0d36ca21c018d324488c746 Mon Sep 17 00:00:00 2001
From: Julien Schueller <schueller@phimeca.com>
Date: Wed, 25 May 2016 14:20:21 +0200
Subject: [PATCH] Fix MathExtError arguments in imgmath

It's constructor is:
```class MathExtError(SphinxError):
    def __init__(self, msg, stderr=None, stdout=None):```
---
 sphinx/ext/imgmath.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sphinx/ext/imgmath.py b/sphinx/ext/imgmath.py
index 755e417fe..f7a48545b 100644
--- a/sphinx/ext/imgmath.py
+++ b/sphinx/ext/imgmath.py
@@ -185,7 +185,7 @@ def render_math(self, math):
 
     stdout, stderr = p.communicate()
     if p.returncode != 0:
-        raise MathExtError('%s exited with error',
+        raise MathExtError('%s exited with error' %
                            image_translator, stderr, stdout)
     depth = None
     if use_preview and image_format == 'png':  # depth is only useful for png