[clang] [clang][Parse] Improve diagnostics for '>>>' closing template parameter lists in CUDA. (PR #219638)

[Mahmoud Ahmed via cfe-commits]

anondeveg wrote:

> These two test files need to be checked line by line.

can you clarify more what do you mean by checked line by line? 

https://github.com/llvm/llvm-project/pull/219638