rb: add sort() that re-sorts tree with new compare function
rb: add sort() that re-sorts tree with new compare function

You can also specify the same compare function, but after updating the
context that the function will use (connected to the rb.Tree) before.

andrewrk/zig,raulgrell/zig,raulgrell/zig,raulgrell/zig,raulgrell/zig,andrewrk/zig,zig-lang/zig,raulgrell/zig,zig-lang/zig,zig-lang/zig