bazel syntax: fix bug parsing load statements

Previously, the parser would reject "x=1; load(...)" or "load(...); x=1".
(The .bzl formatter will replace those semicolons with newlines, though.)

This change treats load statements as "small statements",
just like return statements and function calls (which are a special case
of expression statements).

(The comment removed from the validator test was incorrect.
The assertions added in commit 7433b1c83a2270d6a6f67118a26ea1d300f52390 passed spuriously because
of the stateful error collector: the first two assertions produced
the expected error, but the third and fourth calls did not, yet they
observed the stale error.)

PiperOrigin-RevId: 293181239
4 files changed
tree: f5f06e60b2d4448430d2cc40ed1abb7d2fb24d77
  1. .bazelci/
  2. examples/
  3. scripts/
  4. site/
  5. src/
  6. third_party/
  7. tools/
  8. .bazelrc
  9. .gitattributes
  10. .gitignore
  11. AUTHORS
  12. BUILD
  13. CHANGELOG.md
  14. CODEOWNERS
  15. combine_distfiles.py
  16. combine_distfiles_to_tar.sh
  17. compile.sh
  18. CONTRIBUTING.md
  19. CONTRIBUTORS
  20. distdir.bzl
  21. ISSUE_TEMPLATE.md
  22. LICENSE
  23. README.md
  24. WORKSPACE
README.md

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