error: two files
  --> foo.proto:3:9
   |
 3 | package abc.xyz;
   |         ^^^^^^^ foo
 4 |
 5 | message Blah {
   |         ---- bar
   |
  ::: bar.proto:3:9
   |
 3 | package abc.xyz2;
   |         ------- baz

error: two files with page break
  --> foo.proto:3:9
   |
 3 | package abc.xyz;
   |         ^^^^^^^ foo
   |
  ::: foo.proto:5:9
   |
 5 | message Blah {
   |         ---- bar
   |
  ::: bar.proto:3:9
   |
 3 | package abc.xyz2;
   |         ------- baz

error: three files
  --> foo.proto:3:9
   |
 3 | package abc.xyz;
   |         ^^^^^^^ foo
   |
  ::: bar.proto:3:9
   |
 3 | package abc.xyz2;
   |         ------- baz
   |
  ::: foo.proto:5:9
   |
 5 | message Blah {
   |         ---- bar

encountered 3 errors