Treepl’s implementation of the Liquid capitalize
filter actually does Title Case instead of the documented Capitalize function:
https://shopify.github.io/liquid/filters/capitalize/
Both case changes are handy though, so since Title Case is obviously possible I’d ask that a new custom Liquid filter be created called titlecase
which does what the currently implemented capitalize
filter does - then fix the current capitalize
filter to work as per the Liquid docs.