define USAGE
{a.style('usage','header')}:\n	make <recipe>\n
  Turn your {a.style('`Makefile`','b_magenta')} into
  the {a.italic}{a.underline}task runner{a.end} you always needed.
  See the example output below.\n
endef

EPILOG = \nfor more info: gh.dayl.in/task.mk
PRINT_VARS := VERSION SHELL