yi-0.10.1: src/tests/vimtests/blockvisual/y_12.test
-- Input (2,2) abcdef abcdef abcdef abcdef -- Output (3,3) abcdef abcdef abbcdcdef abbcdcdef bcd -- Events <C-v>lljjyjp
-- Input (2,2) abcdef abcdef abcdef abcdef -- Output (3,3) abcdef abcdef abbcdcdef abbcdcdef bcd -- Events <C-v>lljjyjp