patch 8.2.3936: no proper test for maintaining change mark in diff mode Commit: https://github.com/vim/vim/commit/ccc1644f95e7833c23fa0d440e42293c1622fdcb Author: Sean Dewar <seandewar@users.noreply.github.com> Date: Wed Dec 29 16:44:48 2021 +0000 patch 8.2.3936: no proper test for maintaining change mark in diff mode Problem: No proper test for maintaining change mark in diff mode. Solution: Run the test with internal and external diff. (Sean Dewar, closes #9424)

|4+0&#ffffff0|5| @72
|4|6| @72
|4|7| @72
|4|8| @72
|4|9| @72
>n|o|w| |w|o|r|k|i|n|g| |w|i|t|h| |s|o|m|e| |l|o|n|g|e|r| |t|e|x|t| |h|e|r|e| @36
|5|1| @72
|5|2| @72
|5|3| @72
|5|4| @72
|5@1| @72
|:|c|a|l@1| |p|r|o|p|_|c|l|e|a|r|(|5|0|)| @36|5|0|,|1| @9|4|9|%|