Changes to liquid as used in notification emails

[ChristyMc]

Hello,

I've been using Liquid in notification emails to supply a different message for pick-up, but it seems within the last week that the following no longer returns true:

{% if delivery_method == 'pick-up' %}
   // DO THIS
{% else %}
   // DO THAT
{% endif %}

Has the syntax changed in the last week?

Thanks in advance,

Chris