add spaces to dock mac code example

Example 1: space in dock mac

defaults write com.apple.dock persistent-apps -array-add '{"tile-type"="spacer-tile";}'
#When the terminal prompt appears again type the following command
killall Dock

Example 2: css tricks macos spaces in dock

defaults write com.apple.dock persistent-apps -array-add '{"tile-type"="spacer-tile";}'