warning: non-canonical string literal in import
  --> testdata/parser/import/repeated.proto:20:8
   |
20 | import "foo\x2eproto";
   |        ^^^^^^^^^^^^^^
  help: replace it with a canonical string
   |
20 | - import "foo\x2eproto";
20 | + import "foo.proto";
   |

encountered 1 warning
