Update osx.plugin.zsh

Added function to display the song you're currently listening to in iTunes

Fixed indent

Indentation on line 169 was squiffy

Fixed spelling

Removed unnecessary wording to make function more succinct.

Highlighting of Artist and Track

Changed the highlighting of the Track and Artist in yellow to make use of Prompt Expansion Colors

plugins/osx/osx.plugin.zsh

@@ -161,6 +161,15 @@ function itunes() {
 		vol)
 			opt="set sound volume to $1" #$1 Due to the shift
 			;;
+		playing)
+			local state=`osascript -e 'tell application "iTunes" to player state as string'`
+			if [ "$state" = "playing" ]; then
+				currenttrack=`osascript -e 'tell application "iTunes" to name of current track as string'`
+				currentartist=`osascript -e 'tell application "iTunes" to artist of current track as string'`
+				echo "Listening to %F{yellow}$currenttrack%f by %F{yellow}$currentartist%f";
+			fi
+			return 0
+			;;
 		shuf|shuff|shuffle)
 			# The shuffle property of current playlist can't be changed in iTunes 12,
 			# so this workaround uses AppleScript to simulate user input instead.
@@ -199,6 +208,7 @@ EOF
 			echo "\tnext|previous\tplay next or previous track"
 			echo "\tshuf|shuffle [on|off|toggle]\tSet shuffled playback. Default: toggle. Note: toggle doesn't support the MiniPlayer."
 			echo "\tvol\tSet the volume, takes an argument from 0 to 100"
+			echo "\tplaying\tShow what song is currently playing in iTunes."
 			echo "\thelp\tshow this message and exit"
 			return 0
 			;;