patch 8.0.0250: virtcol() does not work well for multi-byte characters commit https://github.com/vim/vim/commit/0c0590d9827cb07a33c1552cb3558b94bddcb4dc Author: Bram Moolenaar <Bram@vim.org> Date: Sat Jan 28 13:48:10 2017 +0100 patch 8.0.0250: virtcol() does not work well for multi-byte characters Problem: When virtcol() gets a column that is not the first byte of a multi-byte character the result is unpredictable. (Christian Ludwig) Solution: Correct the column to the first byte of a multi-byte character. Change the utf-8 test to new style.

Tests for setting the '[,'] marks when joining lines.

STARTTEST
:so small.vim
:/^\t\t/
0gqj:
:let a=string(getpos("'[")).'/'.string(getpos("']"))
:/^This line/;'}-join
:let b=string(getpos("'[")).'/'.string(getpos("']"))
:$put ='First test: Start/End '.string(a)
:$put ='Second test: Start/End '.string(b)
:/^\t\t/,$wq! test.out
ENDTEST


		O sodales, ludite, vos qui
attamen consulite per voster honur. Tua pulchra facies me fay planszer milies

This line.
Should be joined with the next line
and with this line

Results: