class Reline::LineEditor

def vi_delete_prev_char(key) 

def vi_delete_prev_char(key)
_multiline and @cursor == 0 and @line_index > 0
fer_of_lines[@line_index] = @line
sor = calculate_width(@buffer_of_lines[@line_index - 1])
e_pointer = @buffer_of_lines[@line_index - 1].bytesize
fer_of_lines[@line_index - 1] += @buffer_of_lines.delete_at(@line_index)
e_index -= 1
e = @buffer_of_lines[@line_index]
sor_max = calculate_width(@line)
ender_all = true
@cursor > 0
_size = Reline::Unicode.get_prev_mbchar_size(@line, @byte_pointer)
e_pointer -= byte_size
e, mbchar = byteslice!(@line, @byte_pointer, byte_size)
h = Reline::Unicode.get_mbchar_width(mbchar)
sor -= width
sor_max -= width