Fix to give `LineInfo` to options error spans.

pkg/analyzer/test/src/task/options_test.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library test.src.task.options_test;
 
 import 'package:analyzer/analyzer.dart';
 import 'package:analyzer/source/analysis_options_provider.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/task/options.dart';
+import 'package:analyzer/task/general.dart';
 import 'package:analyzer/task/model.dart';
 import 'package:unittest/unittest.dart';
 
 import '../../generated/test_support.dart';
 import '../../reflective_tests.dart';
 import '../../utils.dart';
 import '../context/abstract_context.dart';
 
 main() {
   initializeTestEnvironment();
@@ skipping 64 matching lines @@
 
   test_perform_OK() {
     String code = r'''
 analyzer:
   strong-mode: true
 ''';
     AnalysisTarget target = newSource(optionsFilePath, code);
     computeResult(target, ANALYSIS_OPTIONS_ERRORS);
     expect(task, isGenerateOptionsErrorsTask);
     expect(outputs[ANALYSIS_OPTIONS_ERRORS], isEmpty);
+    LineInfo lineInfo = outputs[LINE_INFO];
+    expect(lineInfo, isNotNull);
+    expect(lineInfo.getLocation(1).lineNumber, 1);
+    expect(lineInfo.getLocation(10).lineNumber, 2);
   }
 
   test_perform_unsupported_analyzer_option() {
     String code = r'''
 analyzer:
   not_supported: true
 ''';
     AnalysisTarget target = newSource(optionsFilePath, code);
     computeResult(target, ANALYSIS_OPTIONS_ERRORS);
     expect(task, isGenerateOptionsErrorsTask);
@@ skipping 58 matching lines @@
         [AnalysisOptionsWarningCode.UNSUPPORTED_OPTION]);
   }
 
   void validate(String source, List<AnalysisOptionsErrorCode> expected) {
     var options = optionsProvider.getOptionsFromString(source);
     var errors = validator.validate(options);
     expect(errors.map((AnalysisError e) => e.errorCode),
         unorderedEquals(expected));
   }
 }