[llvm] Refine the examples in the debug info document (PR #86272)

[Stephen Tozer via llvm-commits]

https://github.com/SLTozer commented:

Thanks for looking at this - changes look broadly good (with some inline comments), but we should give some time for debug info code owners to weigh in, in case they have thoughts.

https://github.com/llvm/llvm-project/pull/86272