update frontmatter notes

content/00.front-matter.md

@@ -37,13 +37,13 @@ on {{manubot.date}}.
     {% if author.orcid is defined -%}
     [![ORCID icon](images/orcid.svg){height="11px" width="11px"}](https://orcid.org/{{author.orcid}})
     {%- endif %}
-    {{author.name}}<sup>{{author.affiliation_numbers | join(',')}}{%- if author.symbol_str is defined -%},{{author.symbol_str}}{%- endif -%}</sup>
+    {{author.name}}<sup>{{author.affiliation_numbers | join(',')}}♠</sup>
     {%- if not loop.last -%}, {%- endif -%}
   {%- endif -%}
 {% endfor %}
 
-<sup>☯</sup> --- Author order was determined with a randomized algorithm<br>
-<sup>†</sup> --- To whom correspondence should be addressed: gitter@biostat.wisc.edu (A.G.) and greenescientist@gmail.com (C.S.G.)
+<sup>♠</sup> --- Author order for version 2.0 is currently arbitrary.<br>
+<sup>†</sup> --- To whom correspondence should be addressed: greenescientist@gmail.com (C.S.G.)
 
 ### Version 1.0 Authors