Added a colon to the invalid arg prompt field.
Added a colon to the invalid arg prompt field.

FokkeZB/titanium,titanium-forks/appcelerator.titanium,salem/titanium,titanium-forks/appcelerator.titanium,salem/titanium,salem/titanium,FokkeZB/titanium,cheekiatng/titanium,titanium-forks/appcelerator.titanium,cheekiatng/titanium,FokkeZB/titanium,cheekiatng/titanium