Formatting add redundant whitespaces

I'm not sure if this can be considered a bug.

But my idea is to reformat the file after these changes.

I expected only an empty string between string a = 1; string b = 2;, but I actually got an empty string with two whitespaces.

 @Test
 public void should_format_file_without_empty_line_with_whitespaces() {
     // given
     var loader = new SchemaLoader(FileSystems.getDefault());
     var linker = new Linker(loader, new ErrorCollector(), true, true);
     var testFileLocation = Location.get("<TEST_PROTO_FILE>");
     loader.initRoots(List.of(testFileLocation), List.of(testFileLocation));
     var file = loader.load("test/file.proto");
     var schema = linker.link(List.of(file));

     // when
     var protoFile = schema.protoFile("test/file.proto");

     // then
     assertThat(protoFile.toSchema())
             .isEqualTo("""
                     // Proto schema formatted by Wire, do not edit.
                     // Source: test/file.proto
                                             
                     syntax = "proto3";
                                             
                     package test.dependency;
                                             
                     message TestMessage {
                       message NestedMessage {
                         string a = 1;
                    
                         string b = 2;
                       }
                     }
                     """);
 }

Start with the test shown in the issue, especially SchemaLoader, Linker, and protoFile.toSchema(), and trace how test/file.proto is formatted. Confirm the expected output for empty lines between string a = 1 and string b = 2, then update or add the relevant regression test and verify the generated schema contains no redundant whitespace.