Format all dart: library files

sdk/lib/core/regexp.dart

Index: sdk/lib/core/regexp.dart
diff --git a/sdk/lib/core/regexp.dart b/sdk/lib/core/regexp.dart
index 09874c4c1117e77f8addbf1e05103866bd46052c..7388256256146af42c56273c718006cad50cab82 100644
--- a/sdk/lib/core/regexp.dart
+++ b/sdk/lib/core/regexp.dart
@@ -40,8 +40,8 @@ abstract class RegExp implements Pattern {
    * Throws a [FormatException] if [source] is not valid regular
    * expression syntax.
    */
-  external factory RegExp(String source, {bool multiLine: false,
-                                          bool caseSensitive: true});
+  external factory RegExp(String source,
+      {bool multiLine: false, bool caseSensitive: true});
 
   /**
    * Searches for the first match of the regular expression