Add `with_suffix` macro?

[tobiasvl]

Perhaps not such a common use case as stripping prefixes, but it would be nice if there was a symmetrical with_suffix macro that could strip suffixes.

[jonasbb]

Hi, thanks for the interest. I am open to accepting a PR to add this macro. I have not seen much demand for such a macro so far.

The implementation can probably mostly be taken from the existing with_prefix macro, the main differences being the parts where the prefix is added/stripped.

[jonasbb]

If someone needs this, feel welcome to submit a PR. But I would rather not keep the issue open indefinitely.