cc53877328
Seed ~/.gitignore_global from /etc/skel-devbox (seed-if-absent, like .bash_aliases/.inputrc, so user edits survive recreate) and wire it via git config --global core.excludesFile, guarded so a user-set excludesFile is never overridden. Ignores *.bak, *.bak.*, *~, *.orig, *.swp, *.tmp across all repos without per-repo .gitignore entries.