diff -r 5171ac3b4232 -r cd7667c861d6 rt/emul/fake/src/main/java/java/io/PrintWriter.java
--- a/rt/emul/fake/src/main/java/java/io/PrintWriter.java	Wed Apr 30 09:26:28 2014 +0200
+++ b/rt/emul/fake/src/main/java/java/io/PrintWriter.java	Fri May 02 09:05:53 2014 +0200
@@ -21,6 +21,6 @@
  * @author Jaroslav Tulach
  */
 public abstract class PrintWriter {
-    public abstract PrintWriter append(String s);
+    public abstract PrintWriter append(CharSequence s);
     public abstract void println(String s);
 }