Expand check-parser-errors to match multiple errrors per line.

* check-parser-errors can match multiple errors per line;
* Add offset notation to expected-error;

PiperOrigin-RevId: 203625348
2 files changed
tree: b244bc7d7f7c70db08903a0bf36cab7845f4bb4f
  1. include/
  2. lib/
  3. test/
  4. tools/
  5. LICENSE.TXT