.ONESHELL:
.PHONY: index.html
# Utils:
# Discount https://www.pell.portland.or.us/~orc/Code/discount/
# GNU Coreutils https://www.gnu.org/software/coreutils/
# FIXME prevent raw html tags wrapped by
index.html: index.md index.js disclaimer header.html style.css
sed -E 's@ #(\S+)@ \1@g' $< | \
sed -E '/^/,/^/ { s@^## (.*)$$@\1
\n@; s@^$$@\n