patch 8.0.0548: saving the redo buffer only works one time commit https://github.com/vim/vim/commit/d4863aa99e0527e9505c79cbeafc68a6832200bf Author: Bram Moolenaar <Bram@vim.org> Date: Fri Apr 7 19:50:12 2017 +0200 patch 8.0.0548: saving the redo buffer only works one time Problem: Saving the redo buffer only works one time, resulting in the "." command not working well for a function call inside another function call. (Ingo Karkat) Solution: Save the redo buffer at every user function call. (closes #1619)

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: