diff -up patch-2.7.1/src/pch.c.orig patch-2.7.1/src/pch.c
--- patch-2.7.1/src/pch.c.orig	2019-09-02 10:01:18.283754723 +0200
+++ patch-2.7.1/src/pch.c	2019-09-02 10:03:31.742214005 +0200
@@ -2459,9 +2459,6 @@ do_ed_script (char const *inname, char c
            *outname_needs_removal = true;
            copy_file (inname, outname, 0, exclusive, instat.st_mode, true);
          }
-       sprintf (buf, "%s %s%s", editor_program,
-                verbosity == VERBOSE ? "" : "- ",
-                outname);
        fflush (stdout);
 
        pid = fork();
@@ -2470,7 +2467,8 @@ do_ed_script (char const *inname, char c
        else if (pid == 0)
          {
            dup2 (tmpfd, 0);
-           execl ("/bin/sh", "sh", "-c", buf, (char *) 0);
+           assert (outname[0] != '!' && outname[0] != '-');
+           execlp (editor_program, editor_program, "-", outname, (char  *) NULL);
            _exit (2);
          }
        else