Allow use of "* * *" as delimiter for special variables

[ivansaurio]

I have the following template:

---

project: dropdown(TEST1,TEST2,TEST3)  
template_title: {{ date }} - {{ project }}  
template_tags: TESTTAG, {{ project }}

---

# {{date}}
{{project}}:

If I switch to the wysiwyg editor and make some modification, then all the "---" get replaced with "* * *", breaking the variables in the template

The only installed plugins are templates and backup (probably not related to the issue)

I guess the easy way to fix this could be to allow "* * *" as the special variables delimiter HERE