Extract unit test updates by @ericvergnaud needed for TypeScript#4029

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parrt merged 1 commit intoantlr:devfrom

parrt:eric-test-updates

Dec 20, 2022

Commits on Dec 20, 2022

Extract unit test updates by @ericvergnaud in https://github.com/antlr/antlr4/pull/4027 then he can rebase after we merge this into dev. All tests pass locally (didn't check python2 actually but p…
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