Split long strings

[janisz]

It will be great if golines could split long strings e.g.
Before:

	s :=  "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Morbi sit amet lorem non ante faucibus tempor in ac ex. Fusce lobortis eget est tincidunt eleifend. Nulla facilisi. Maecenas at dignissim dolor. In euismod non felis vel dapibus. Donec fringilla lectus in nisi luctus, nec faucibus massa convallis. Cras vitae tincidunt est. Aliquam ut dictum nibh. Mauris vel enim eget justo efficitur convallis. Aenean faucibus turpis tortor, nec varius ex porta nec. Sed commodo odio purus, in ultrices libero interdum tristique. Etiam hendrerit, justo vitae pellentesque viverra, purus ipsum elementum nunc, quis pellentesque mi nulla at enim."

After:

	s :=  "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Morbi sit amet lorem non " +
		"ante faucibus tempor in ac ex. Fusce lobortis eget est tincidunt eleifend. Nulla " +
		"facilisi. Maecenas at dignissim dolor. In euismod non felis vel dapibus. Donec " +
		"fringilla lectus in nisi luctus, nec faucibus massa convallis. Cras vitae tincidunt " +
		"est. Aliquam ut dictum nibh. Mauris vel enim eget justo efficitur convallis. Aenean " +
		"faucibus turpis tortor, nec varius ex porta nec. Sed commodo odio purus, in ultrices " +
		"libero interdum tristique. Etiam hendrerit, justo vitae pellentesque viverra, purus " +
		"ipsum elementum nunc, quis pellentesque mi nulla at enim."

It will be nice if user can specify options similar to fold

       -s, --spaces
              break at spaces

[yolken-segment]

Thanks for the suggestion. I originally decided to not handle long strings because some people don't like the + approach to splitting them up. However, as long as it's opt-in, I think it's reasonable to implement. Will add it to the enhancement queue.

[sfllaw]

Please don't. Much like comments, there is no good way to break up actual text. This will just start a cascade of complaints that string-wrapping isn't doing the right thing.