patch 8.2.4948: cannot use Perl heredoc in nested :def function Commit: https://github.com/vim/vim/commit/d881d1598467d88808bafd2fa86982ebbca7dcc1 Author: Bram Moolenaar <Bram@vim.org> Date: Fri May 13 13:50:36 2022 +0100 patch 8.2.4948: cannot use Perl heredoc in nested :def function Problem: Cannot use Perl heredoc in nested :def function. (Virginia Senioria) Solution: Only concatenate heredoc lines when not in a nested function. (closes #10415)

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