# diffstat anchors do not link across attachments or messages:
$idx[0] = $upfx . $idx[0] if $upfx ne '';
$ctx->{-apfx} = join('/', @idx);
# diffstat anchors do not link across attachments or messages:
$idx[0] = $upfx . $idx[0] if $upfx ne '';
$ctx->{-apfx} = join('/', @idx);