--- a/hgext/extdiff.py	Fri May 29 03:43:08 2020 +0200
+++ b/hgext/extdiff.py	Fri May 29 03:56:07 2020 +0200
@@ -233,7 +233,6 @@
     ''' like 'procutil.system', but returns the Popen object directly
         so we don't have to wait on it.
     '''
-    cmd = procutil.quotecommand(cmd)
     env = procutil.shellenviron(environ)
     proc = subprocess.Popen(
         procutil.tonativestr(cmd),