[renamerOnUpdate] [bug] some periods being ignored in default_template

[echo6ix]

@Belleyy

Possible bug here. Since the recent updates, the default_template will ignore the . character if the element field after it is null.

default_template = "$studio.$date.$title{_$studio_code}{.$performer}"

$studio	$date	$title	$performer	Expected rename	Actual rename
Studio	null	Title	Performer	Studio..Title.Performer ✅	Studio.Title.Performer ❌
Studio	null	null	Performer	Studio...Performer ✅	Studio.Performer ❌

config.zip