From a45adc356ef27e3a987607ff74bef849a3ca09c0 Mon Sep 17 00:00:00 2001
From: Greg Stein <gstein@gmail.com>
Date: Sun, 26 Jul 2020 18:19:49 -0500
Subject: [PATCH] default should be an iterable

The code looks at `fmt` as an iterable. Tweak the default value to avoid iteration of 'p', 'd', 'f'.
---
 src/wireviz/Harness.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/wireviz/Harness.py b/src/wireviz/Harness.py
index c50384e..f210f5c 100644
--- a/src/wireviz/Harness.py
+++ b/src/wireviz/Harness.py
@@ -211,7 +211,7 @@ class Harness:
 
         return dot
 
-    def output(self, filename, directory='_output', view=False, cleanup=True, fmt='pdf', gen_bom=False):
+    def output(self, filename, directory='_output', view=False, cleanup=True, fmt=('pdf',), gen_bom=False):
         # graphical output
         graph = self.create_graph()
         for f in fmt: