From 4859562ad2f66d9da62d0e0ac066f01256dcb5b6 Mon Sep 17 00:00:00 2001
From: Tim Hoffmann <2836374+timhoffm@users.noreply.github.com>
Date: Tue, 7 May 2019 22:27:09 +0200
Subject: [PATCH] Fix regexp for dvipng version detection

---
 lib/matplotlib/__init__.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/matplotlib/__init__.py b/lib/matplotlib/__init__.py
index 8a2a4b36e0e1..f18dcf037c94 100644
--- a/lib/matplotlib/__init__.py
+++ b/lib/matplotlib/__init__.py
@@ -331,7 +331,7 @@ def impl(args, regex, min_ver=None):
                 f"{' '.join(args)}, which output {output}")
 
     if name == "dvipng":
-        return impl(["dvipng", "-version"], "(?m)^dvipng .* (.+)", "1.6")
+        return impl(["dvipng", "-version"], "(?m)^dvipng(?: .*)? (.+)", "1.6")
     elif name == "gs":
         execs = (["gswin32c", "gswin64c", "mgs", "gs"]  # "mgs" for miktex.
                  if sys.platform == "win32" else