Merge branch 'Sangdol-set-wallpaper-if-changed'

this fixes rgcr#100

this fixes fish-shell/fish-shell#3557

Merge pull request rgcr#87 from CrystalStiletto/formatting

small formatting fixes

Merge branch 'musically-ut-feat-display'

unsing printf instead echo

Merge pull request rgcr#78 from akiekintveld/macOS-text-fix

Change all mentions of 'Mac OS X' or 'OS X' to 'macOS' to reflect the new name

This commit fixes rgcr#76

Adding simple fish completion

fixing conflicts