[flang] [llvm] [flang-rt] Extension: accept '!' as value separator in NAMELIST input (PR #200441)

[Tarun Prabhu via llvm-commits]

https://github.com/tarunprabhu commented:

This looks reasonable to me, but maybe let someone more familiar with the runtime and its unit-testing approve.

https://github.com/llvm/llvm-project/pull/200441