Hi, please consider adding the .rej extension to the diff/patch file type, as they are unapplied chunks generated by patch.
Git commit 4cf96a6fd22fa52395c7317c46e94668c70dcf0e by Christoph Cullmann. Committed on 12/09/2019 at 13:44. Pushed by cullmann into branch 'master'. support *.rej for diff highlighting M +1 -1 data/syntax/diff.xml https://commits.kde.org/syntax-highlighting/4cf96a6fd22fa52395c7317c46e94668c70dcf0e