In Emacs 28 it loads files referenced by diff-mode, polluting buffer list & recentf, and significantly slowing Emacs in Cygwin. https://debbugs.gnu.org/cgi/bugreport.cgi?bug=62749 https://emacs.stackexchange.com/questions/76728/modern-emacs-keeps-opening-related-file-from-vc-diff-buffer/

syntax: glob

.devel/
.tmp/
*.dev.el