class Reline::LineEditor

def em_kill_line(key)

current line, no matter where point is.
GNU Readline:: +kill-whole-line+ (not bound) Kill all characters on the
edit buffer and save it to the cut buffer. +vi-kill-line-prev+
Editline:: +em-kill-line+ (not bound) Delete the entire contents of the 
def em_kill_line(key)
ne.size > 0
l_ring.append(@line.dup, true)
e.clear
e_pointer = 0
sor_max = 0
sor = 0