Rollup merge of #149525 - RalfJung:debuginfo-test-comments, r=jieyouxu

debuginfo/macro-stepping test: extend comments

Those `#locN` markers look like they are debuginfo compiletest magic (since `#break` is debuginfo compiletest magic). However, they are actually just magic strings used by the `check` commands in the test itself. This threw me off when I looked at the test (prompted by a CI failure), so let's leave a comment for the next poor soul that ends up lost in this test.

Also, for some reason the lldb instructions do not check for `#loc6`, unlike the gdb instructions. I do not know of an lldb version that actually makes the test pass (do we even run it with lldb at all on CI?), so I won't try to add a check for loc6, but let's at least add a comment to increase the chance that someone more knowledgeable about lldb and our test suite notices this in the future.
tree: 24dccbe9040db5c69ae575cede88ca94bc9bee02
  1. .github/
  2. compiler/
  3. library/
  4. LICENSES/
  5. src/
  6. tests/
  7. .clang-format
  8. .editorconfig
  9. .git-blame-ignore-revs
  10. .gitattributes
  11. .gitignore
  12. .gitmodules
  13. .ignore
  14. .mailmap
  15. bootstrap.example.toml
  16. Cargo.lock
  17. Cargo.toml
  18. CODE_OF_CONDUCT.md
  19. configure
  20. CONTRIBUTING.md
  21. COPYRIGHT
  22. INSTALL.md
  23. LICENSE-APACHE
  24. license-metadata.json
  25. LICENSE-MIT
  26. package.json
  27. README.md
  28. RELEASES.md
  29. REUSE.toml
  30. rust-bors.toml
  31. rustfmt.toml
  32. triagebot.toml
  33. typos.toml
  34. x
  35. x.ps1
  36. x.py
  37. yarn.lock
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