Re: [PATCH] difftool: avoid symlinks when reusing worktree files

David Aguilar [off-list ref] writes:

quoted

+	if (-l "$workdir/$file" || ! -e _) {
 		return (0, $null_sha1);
 	}

The "-e _" shorthand caught my eye ~ I didn't know perl could do that!
Nice.

Underline is barely mentioned in perlvar, but it's obvious what
(I think) it means, and since Perl is DWIM, it must be right. ;-)

It is mentioned under -X (i.e. the headline for -f, -e, -d,
... tests) in perlfunc with an interesting example of doing
an explicit stat() first and then running many variants of -X
with _ as the target.