patch 9.0.1435: scrolling too many lines when 'wrap' and 'diff' are set Commit: https://github.com/vim/vim/commit/38d867f041349e1400c2cce9cac06f59ae6ccbb1 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Apr 1 19:54:40 2023 +0100 patch 9.0.1435: scrolling too many lines when 'wrap' and 'diff' are set Problem: Scrolling too many lines when 'wrap' and 'diff' are set. Solution: Only scroll by screenlines for 'diff' when 'wrap' is not set. (closes #12211)

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