Index: sdk/lib/core/string_sink.dart |
diff --git a/sdk/lib/core/string_sink.dart b/sdk/lib/core/string_sink.dart |
index 04650f7014f49c6516fa741a257bd105b2db92ba..1e1647edeee24711cb62f680fdf6974dd89c649d 100644 |
--- a/sdk/lib/core/string_sink.dart |
+++ b/sdk/lib/core/string_sink.dart |
@@ -21,7 +21,7 @@ abstract class StringSink { |
* Converts [obj] to a String by invoking `toString` and adds the result to |
* `this`. Then adds a new line. |
*/ |
- void writeln(Object obj); |
+ void writeln([Object obj = ""]); |
/** |
* Writes the [charCode] to `this`. |