span(x) range doesn't always include correct maximum value

[JB0NK]

Problem

The span implementation creates ranges with step size 1.0 for floating-point data. That leads to scenarios where:

span([-2.73, 22.75])

returns

-2.73:1.0:22.27 

which includes the minimum but not the correct maximum value.

I know this is the expected result of range(-2.73, 22.75), which span uses, but I'm wondering if it is appropriate for most (statistical) use cases. Before happening upon this and having a look at span(x)'s implementation, I assumed span to refer to the statistical range $T$, as in $T=max(x_1,x_2,...,x_n) - min(x_1,x_2,...,x_n)$.

Even if that is not the case, I think span not returning the correct maximum value is a potential source for confusion and/or trouble for users.