julia

77400204 - Document reservation of double underscore names (dunders) (#51215)

Document reservation of double underscore names (dunders) (#51215) In the recent discussion about `main`, `__main__` was proposed. One reason in favor of this is that double underscore, or dunder, names are reserved names in Julia. This however is not documented. This pull request adds a paragraph reserving double underscore names for Julia. They are added to Base -> Essentials -> Keywords where other reserved names are documented. https://docs.julialang.org/en/v1.11-dev/base/base/#Keywords cc: @StefanKarpinski --------- Co-authored-by: 3f6a <126961207+3f6a@users.noreply.github.com>