docs: def lcm( *a ):
    """Least common multiple.
  
    Usage: lcm( [ 3, 4, 5 ] )
    or:    lcm( 3, 4, 5 )
    """
  
    if len( a ) > 1: return reduce( lcm2, a )
    if hasattr( a[0], "__iter__" ): return reduce( lcm2, a[0] )
    return a[0]