Extract FileUtils updates by @ericvergnaud#4030

Merged

parrt merged 1 commit intoantlr:devfrom parrt:eric-fileutils-update

Dec 20, 2022

+18-3

Commits on Dec 20, 2022

Extract FileUtils updates by @ericvergnaud in antlr#4027 then he can rebase after we merge this into dev. All tests pass locally (didn't check python2 actually but python3 works).
parrt
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