anchor.diff:    /// Creates a name for the snippets tool to use for the snippet ID from a
     /// filename and starting line number.
     String _createNameFromSource(String prefix, String filename, int start) {
  -    String snippetId = path.relative(filename, from: _flutterPackage.path);
  -    snippetId = path.split(snippetId).join('.');
  +    String snippetId = path.split(filename).join('.');
       snippetId = path.basenameWithoutExtension(snippetId);
       snippetId = '$prefix.$snippetId.$start';
       return snippetId;
  
positive.code: 
  import 'dart:io';
  
  import 'package:path/path.dart' as path;
  
  // To run this: bin/cache/dart-sdk/bin/dart dev/bots/analyze-sample-code.dart
  
negative.code:   /// Writes out a sample section to the disk and returns the file.
    File _writeSection(Section section) {
      final String sectionId = _createNameFromSource('sample', section.start.filename, section.start.line);
      final File outputFile = File(path.join(_tempDirectory.path, '$sectionId.dart'))..createSync(recursive: true);
      final List<Line> mainContents = headers.toList();
      mainContents.add(const Line(''));
      mainContents.add(Line('// From: ${section.start.filename}:${section.start.line}'));
  