warning: non-canonical string literal in import
  --> testdata/parser/import/escapes.proto:19:8
   |
19 | import "foo\x2eproto";
   |        ^^^^^^^^^^^^^^
  help: replace it with a canonical string
   |
19 | - import "foo\x2eproto";
19 | + import "foo.proto";
   |

warning: non-canonical string literal in import
  --> testdata/parser/import/escapes.proto:20:8
   |
20 | import "bar" ".proto";
   |        ^^^^^^^^^^^^^^
  help: replace it with a canonical string
   |
20 | - import "bar" ".proto";
20 | + import "bar.proto";
   |
   = note: Protobuf implicitly concatenates adjacent string literals, like C or
           Python; this can lead to surprising behavior

encountered 2 warnings
