patch 8.2.3684: blockwise insert does not handle autoindent properly Commit: https://github.com/vim/vim/commit/e9b0b40b7978f683977922233b42dd439ef31920 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Nov 27 13:28:24 2021 +0000 patch 8.2.3684: blockwise insert does not handle autoindent properly Problem: Blockwise insert does not handle autoindent properly. Solution: Adjust text column for indent. (closes https://github.com/vim/vim/issues/9229)

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