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)

| +0#af5f00255#ffffff0@1|1| |1+0#0000000&@4| @65
| +0#af5f00255&@1|2| |1+0#0000000&@3|2| @65
| +8#af5f00255&@1|3| >1+8#0000000&@3|3| @65
| +0#af5f00255&@1|4| |1+0#0000000&@3|4| @65
| +0#af5f00255&@1|5| |1+0#0000000&@3|5| @65
| +0#af5f00255&@1|6| |1+0#0000000&@3|6| @65
| +0#af5f00255&@1|7| |1+0#0000000&@3|7| @65
|:|s|e|t| |n|u|m|b|e|r| |c|u|r|s|o|r|l|i|n|e| |c|u|l|o|p|t|=|b|o|t|h| @22|3|,|1| @10|T|o|p|