[flang-commits] [flang] [Flang] Add a Fortran Standards Support doc (PR #132195)

[Michael Klemm via flang-commits]

https://github.com/mjklemm approved this pull request.

LGTM, with the few nits that I have commented on.

I guess we should see if we can get a list of updates for 2018 and 2023 Fortran to populate the list.  We also should list intrinsic functions explicitly if there are supported (or not).

https://github.com/llvm/llvm-project/pull/132195