Unique vs. shared return values

[bearophile]

Ali:

> - either a slice of the entire input string when the field is shorter 
> than the string (this is an optimization)

> [A side question is whether leftJustify() should throw when the field 
> width is shorter than the string.

When the field width is shorter than the input string the three justify functions just don't add whitespace. So they are nothrow.

Bye,
bearophile