Use dartfmt on Observatory code

runtime/observatory/lib/src/elements/source_link.dart

Index: runtime/observatory/lib/src/elements/source_link.dart
diff --git a/runtime/observatory/lib/src/elements/source_link.dart b/runtime/observatory/lib/src/elements/source_link.dart
index 77ef2fe08bbc42adfe4da5396664d33c66463a75..5c6b7a09730708f2ee413c8529352e5e382b3475 100644
--- a/runtime/observatory/lib/src/elements/source_link.dart
+++ b/runtime/observatory/lib/src/elements/source_link.dart
@@ -7,7 +7,7 @@ library source_link_element;
 import 'dart:html';
 import 'dart:async';
 import 'package:observatory/models.dart'
-  show IsolateRef, SourceLocation, Script, ScriptRepository;
+    show IsolateRef, SourceLocation, Script, ScriptRepository;
 import 'package:observatory/src/elements/helpers/rendering_scheduler.dart';
 import 'package:observatory/src/elements/helpers/tag.dart';
 import 'package:observatory/src/elements/helpers/uris.dart';
@@ -27,8 +27,9 @@ class SourceLinkElement extends HtmlElement implements Renderable {
   IsolateRef get isolate => _isolate;
   SourceLocation get location => _location;
 
-  factory SourceLinkElement(IsolateRef isolate, SourceLocation location,
-      ScriptRepository repository, {RenderingQueue queue}) {
+  factory SourceLinkElement(
+      IsolateRef isolate, SourceLocation location, ScriptRepository repository,
+      {RenderingQueue queue}) {
     assert(isolate != null);
     assert(location != null);
     SourceLinkElement e = document.createElement(tag.name);