[flang-commits] [clang] [flang] [llvm] [flang] Improvise the error message for the option "-fconvert" with allowed values (PR #215966)

[Tom Eccles via flang-commits]

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

LGTM with Tarun's comments

https://github.com/llvm/llvm-project/pull/215966