Added a format: method to String which more or less emulates C# and Squeak's format methods.
Added a format: method to String which more or less emulates C# and Squeak's format methods.

briantrice/slate-language,krfkeith/slate-language,krfkeith/slate-language,briantrice/slate-language,briantrice/slate-language,krfkeith/slate-language,briantrice/slate-language,briantrice/slate-language,krfkeith/slate-language,briantrice/slate-language,krfkeith/slate-language,krfkeith/slate-language