patch 8.2.2640: screenstring() returns non-existing composing characters Commit: https://github.com/vim/vim/commit/f1387285e2ebe5cb3688d729fc6fd01a169a76c1 Author: Bram Moolenaar <Bram@vim.org> Date: Mon Mar 22 17:11:15 2021 +0100 patch 8.2.2640: screenstring() returns non-existing composing characters Problem: screenstring() returns non-existing composing characters. Solution: Only use composing characters if there is a base character.

" Test for '' mark in an empty buffer

func Test_empty_buffer()
  new
  insert
a
b
c
d
.
  call assert_equal(1, line("''"))
  bwipe!
endfunc

" vim: shiftwidth=2 sts=2 expandtab