Issue 24442. Fix for renaming library names with spaces.

pkg/analysis_server/lib/src/services/correction/source_range.dart

Index: pkg/analysis_server/lib/src/services/correction/source_range.dart
diff --git a/pkg/analysis_server/lib/src/services/correction/source_range.dart b/pkg/analysis_server/lib/src/services/correction/source_range.dart
index 9ee7078a9767aacc1ae20f7277834d7af760cd5b..779dde7d76d5bd023166f9c5aef1ad4b9b9b2c28 100644
--- a/pkg/analysis_server/lib/src/services/correction/source_range.dart
+++ b/pkg/analysis_server/lib/src/services/correction/source_range.dart
@@ -11,7 +11,7 @@ import 'package:analyzer/src/generated/scanner.dart';
 import 'package:analyzer/src/generated/source.dart';
 
 SourceRange rangeElementName(Element element) {
-  return new SourceRange(element.nameOffset, element.displayName.length);
+  return new SourceRange(element.nameOffset, element.nameLength);
 }
 
 SourceRange rangeEndEnd(a, b) {