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)

| +8#0000001#e0e0e08|+| |[|N|o| |N|a|m|e|]| | +2#0000000#ffffff0|[|N|o| |N|a|m|e|]| | +1&&@49|X+8#0000001#e0e0e08
> +0#0000000#ffffff0@74
|~+0&#e0e0e08| @73
|~| @6|o+0#0000001#ffd7ff255|t|h|e|r| |t|a|b| @10| +0#0000000#e0e0e08@46
|~| @6|a+0#0000001#ffd7ff255| |c+0#ff404010&|o|m@1|e|n|t| +0#0000001&|l|i|n|e| @5| +0#0000000#e0e0e08@46
|~| @73
|~| @73
|~| @73
|~| @73
| +0&#ffffff0@56|0|,|0|-|1| @8|A|l@1|