old style event twitters not showing up

[bridgetkromhout]

Expected behavior

Old style event twitters defined in the welcome page with a param should still display without having to retcon them all by defining them in the datafile and removing the param in the welcome file. The old code looks like this:

Bridgets-MacBook-Air:devopsdays-web bridget$ grep event_twitter content/events/2016-minneapolis/welcome.md 
{{< event_twitter devopsdaysmsp >}} <!-- add your twitter name here without the @ sign -->
Bridgets-MacBook-Air:devopsdays-web bridget$ 
Bridgets-MacBook-Air:devopsdays-web bridget$ grep event_twitter data/events/2016-minneapolis.yml 
Bridgets-MacBook-Air:devopsdays-web bridget$

Actual behavior

Reproduction Steps

Just look at Minneapolis 2016 in prod right now.