def print_checkers(checkers):
    """ Print verbose checker help to stdout. """
    print('')
    print('available checkers:')
    print('')
    for name in sorted(checkers.keys()):
        description, active = checkers[name]
        prefix = '+' if active else ' '
        if len(name) > 30:
            print(' {0} {1}'.format(prefix, name))
            print(' ' * 35 + description)
        else:
            print(' {0} {1: <30}  {2}'.format(prefix, name, description))
    print('')
    print('NOTE: "+" indicates that an analysis is enabled by default.')
    print('')
