Two kinds of data,
Type 1: a \n b \n c \n d \n

Type 2: C1~C4

In EmEditor v17.1.0, Type 1 and Type 2 data is able to paste to B4 position.
But it is not able to paste to A4 position, data “bcd” will be gone.

Compared with v17.0.2, Type 1 data is able to paste to A4 position
(although one of “d” will be pushed out to unexpected position.)
