Well, I think it is possible to merge `splitWhitespace` into `split` like this:
1. `s.split()` splits on whitespace (the way `splitWhitespace` does)
2. all other forms of `split` work like they do now. To get the current
default behaviour of `split` one should use `s.split(Whitespace)`
In other words:
echo " a couple of \t words ".split()
# @[a, couple, of, words]
echo " a couple of \t words ".split(Whitespace)
# @[, , a, couple, of, , , words, ]
This is easy to implement, but as far as I understand that would constitute a
_breaking change_...
