reasonalble toString for easier debugging

src/org/jetbrains/java/decompiler/modules/decompiler/exps/Exprent.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2000-2015 JetBrains s.r.o.
+ * Copyright 2000-2016 JetBrains s.r.o.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -194,4 +194,8 @@ public class Exprent implements IMatchable {
     return true;
   }
 
+  @Override
+  public String toString() {
+    return toJava(0, new BytecodeMappingTracer()).toString();
+  }
 }