oh-my-zsh/plugins/marked2/marked2.plugin.zsh

#
# If marked is called without an argument, open Marked
# If marked is passed a file, open it in Marked
#
function marked() {
    if [ "$1" ]
    then
        open -a "marked 2.app" "$1"
    else
        open -a "marked 2.app"
    fi
}