chown does not support --reference X syntax, only --reference=X #8363
Description
First reported in https://bugs.launchpad.net/ubuntu/+source/rust-coreutils/+bug/2111837; simpler example:
> touch a b
> gnuchown --reference a b
> coreutils chown --reference a b
error: the following required arguments were not provided:
<FILE>...
Usage: chown [OPTION]... [OWNER][:[GROUP]] FILE...
chown [OPTION]... --reference=RFILE FILE...
For more information, try '--help'.
> coreutils chown --reference=a b
This likely affects all command-line argument parsing: The GNU argument parser considers --foo X and --foo=X to be equivalent.