Use safe access for undefined variables #75
Description
Currently there is this code:
<html lang="{{ page.lang | default: site.lang | default: "en-US" }}">
This causes an error when rendering the page in strict mode. In the config use:
# Cause a build to fail if there is a YAML syntax error in a page's front matter.
strict_front_matter: true
# https://jekyllrb.com/docs/configuration/liquid/
liquid:
error_mode: strict
strict_variables: true
strict_filters: true
Please update this to use the safe checkers like: site contains "title".
And of course upstream they should also have default suppress these errors. But whether that is implemented or not, the GitHub Pages default theme should work in strict mode.