[flang-commits] [flang] [flang] Accept C-style comments in label fields (PR #207012)

[Leandro Lupori via flang-commits]

luporl wrote:

The last commit fixes the regression mentioned above.
It also includes other minor fixes and improvements.
It is worth mentioning that preprocessing is also considered enabled when `-E` is specified without `-nocpp`.

https://github.com/llvm/llvm-project/pull/207012