[clang] [clang] Fix incorrect line numbers with -E and raw string (#47577) (PR #77021)

[Aaron Ballman via cfe-commits]

https://github.com/AaronBallman commented:

Thank you for this!

The functional changes look good to me, but it might make sense to rename the test (or add comments) to make it more clear what's being tested and why, and we should have a release note so users know about the fix.

https://github.com/llvm/llvm-project/pull/77021