patch 8.0.0380: with 'linebreak' double wide char wraps badly commit https://github.com/vim/vim/commit/38632faf635f6434441827e136bceb5a930c59ad Author: Bram Moolenaar <Bram@vim.org> Date: Sun Feb 26 19:40:59 2017 +0100 patch 8.0.0380: with 'linebreak' double wide char wraps badly Problem: With 'linebreak' set and 'breakat' includes ">" a double-wide character results in "<<" displayed. Solution: Check for the character not to be replaced. (Ozaki Kiichi, closes #1456)

Test for writing and reading a file of over 100 Kbyte

1 line: "This is the start"
3001 lines: "This is the leader"
1 line: "This is the middle"
3001 lines: "This is the trailer"
1 line: "This is the end"

STARTTEST
:%d
aThis is the start
This is the leader
This is the middle
This is the trailer
This is the endkY3000p2GY3000p
:w! Xtest
:%d
:e! Xtest
:.w! test.out
3003G:.w >>test.out
6005G:.w >>test.out
:qa!
ENDTEST