diff -r 5258bffdb1d6 -r 8e8fd938ca07 mercurial/utils/procutil.py
--- a/mercurial/utils/procutil.py	Fri May 29 03:43:08 2020 +0200
+++ b/mercurial/utils/procutil.py	Fri May 29 03:56:07 2020 +0200
@@ -73,7 +73,6 @@
 getuser = platform.getuser
 getpid = os.getpid
 hidewindow = platform.hidewindow
-quotecommand = platform.quotecommand
 readpipe = platform.readpipe
 setbinary = platform.setbinary
 setsignalhandler = platform.setsignalhandler
@@ -138,7 +137,7 @@
 
 def _popenreader(cmd, bufsize):
     p = subprocess.Popen(
-        tonativestr(quotecommand(cmd)),
+        tonativestr(cmd),
         shell=True,
         bufsize=bufsize,
         close_fds=closefds,
@@ -149,7 +148,7 @@
 
 def _popenwriter(cmd, bufsize):
     p = subprocess.Popen(
-        tonativestr(quotecommand(cmd)),
+        tonativestr(cmd),
         shell=True,
         bufsize=bufsize,
         close_fds=closefds,
@@ -395,7 +394,6 @@
         stdout.flush()
     except Exception:
         pass
-    cmd = quotecommand(cmd)
     env = shellenviron(environ)
     if out is None or isstdout(out):
         rc = subprocess.call(