Implement other operations for arithmetic expansion #38
Description
++ and -- aren't required, but we should have them.
https://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_06_04
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++ and -- aren't required, but we should have them.
https://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_06_04