before the character under the cursor.
All characters to the right of the cursor are moved one space to the right,
with the possibility of the rightmost character on the line being lost.
The insertion operation does not change the cursor position.
.SH RETURN VALUE
before the character under the cursor.
All characters to the right of the cursor are moved one space to the right,
with the possibility of the rightmost character on the line being lost.
The insertion operation does not change the cursor position.
.SH RETURN VALUE