diff --git a/src/PIL/ImageShow.py b/src/PIL/ImageShow.py
index 987989e6f..1b7c95299 100644
--- a/src/PIL/ImageShow.py
+++ b/src/PIL/ImageShow.py
@@ -239,14 +239,10 @@ class UnixViewer(Viewer):
         path = quote(path)
         command = self.get_command(path, **options)
 
-        kwargs = {
-            "shell": True,
-            "stdout": subprocess.PIPE,
-            "stderr": subprocess.PIPE
-        }
+        kwargs = {"shell": True, "stdout": subprocess.PIPE, "stderr": subprocess.PIPE}
 
         th = threading.Thread(
-            target=subprocess.run, args=(command, ), kwargs=kwargs, name=path
+            target=subprocess.run, args=(command,), kwargs=kwargs, name=path
         )
         self.opened_images.append(th.name)
         th.start()