[flang-commits] [flang] [flang][driver] Improve diagnostic for assembly inputs (PR #174316)

[Eugene Epshteyn via flang-commits]

eugeneepshteyn wrote:

@soumikiith , thank you for the change. 

It seems that you need to also modify some of the existing tests.

Please also run Fortran tests in [llvm-test-suite](https://llvm.org/docs/TestSuiteGuide.html) to catch any other tests that may be affected.

https://github.com/llvm/llvm-project/pull/174316