Bug: Acme: 2-1 chord fails to escape its argument

[spektrokalter]

Expected behavior

2-1 chord must always escape its argument, so that the shell doesn't mangle it.

Unexpected behavior

It fails to escape the argument.

I haven't yet succeeded at breaking 2-1 chord with rc shell. But it's easy to break it with acmeshell=/bin/sh.

Steps to reproduce the problem

Run Acme with acmeshell=/bin/sh. Run 2-1 chord on <echo with '$HOME' as its argument. '$HOME'\n must be printed. Instead, it prints the actual value of home directory.

plan9port version

a2567fc

OS version

macOS 14.5 (23F79)