Add String#center

[ilja]

This adds String#center: "hello".center(9, '-') => --hello--

[bcardiff]

I don't see a reason to share code between center and r/ljust as they are written now. The String.justify barely overlaps between these two cases.

I would say to either, handle the center logic directly in String#center and leave String.justify as is.

Or, change String.justify to determine prefix/postfix spaces at the beginning for all direction alignment so to the logic is shared across all cases.

[asterite]

I agree with @bcardiff , it's better to keep the code clean and separate from the other methods

[straight-shoota]

@ilja Are you still interested in meeting the requested changes?

[hutou]

A String.center method would be useful for me.
Is there any chance to see this PR validated ?

[straight-shoota]

The author hasn't responded in two years, so I expect this PR to be stalled. An implementation as suggested above would be very welcome. Feel free to submit a new PR for adding this!

[hutou]

Ok, I'll submit a PR soon.

[bcardiff]

Closed by #8557