switch case range inclusive or exclusive?

[WebFreak001]

In the D spec it says for CaseRangeStatement:
https://dlang.org/spec/statement.html#CaseRangeStatement

> A CaseRangeStatement is a shorthand for listing a series of 
> case statements from FirstExp to LastExp.

does this mean LastExp is inclusive or exclusive part of the 
range?

I think the spec needs to be improved a little bit here for 
clarity.