warning: non-canonical string literal in import
  --> testdata/parser/import/repeated.proto:6:8
   |
 6 | import "foo\x2eproto";
   |        ^^^^^^^^^^^^^^
  help: replace it with a canonical string
   |
 6 | - import "foo\x2eproto";
 6 | + import "foo.proto";
   |

encountered 1 warning
