html: advent.html history.html hints.html
# README.adoc exists because that filename is magic on GitLab.
-DOCS=COPYING NEWS README.adoc TODO advent.adoc history.adoc notes.adoc hints.adoc advent.6 INSTALL.adoc
+DOCS=COPYING NEWS README.adoc advent.adoc history.adoc notes.adoc hints.adoc advent.6 INSTALL.adoc
TESTFILES=tests/*.log tests/*.chk tests/README tests/decheck tests/Makefile
# Can't use GNU tar's --transform, needs to build under Alpine Linux.