tools: lint doc code examples in strict mode
Checklist
-
make -j4 test(UNIX), orvcbuild test(Windows) passes -
commit message follows commit guidelines
Refs: https://github.com/eslint/eslint-plugin-markdown#strict
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
make -j4 test (UNIX), or vcbuild test (Windows) passesRefs: https://github.com/eslint/eslint-plugin-markdown#strict