Diff tool is unrelated. No need for any external tools or plugins, it's PsPad
itself that does the damage. I once got this on a plain TXT file without any
syntax highlighting and without using any functions like search/replace, just
plain manual text editing and then saving. Though it was a while ago, cca 2
years, no such issues with recent versions on such simple files, but it still
occasionally happens on more complex files/with more complex editing.

PSPad freeware editor https://www.pspad.com

Odpovedet emailem