fixed err msg

Author: tomasstupka

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/type/TypeNodes.java

@@ -1029,7 +1029,7 @@ private static PythonAbstractClass[] mergeMROs(MROMergeState[] toMerge, List<Pyt
                 while (it.hasNext()) {
                     bases.append(", ").append(GetNameNode.doSlowPath(it.next()));
                 }
-                throw PRaiseNode.getUncached().raise(TypeError, ErrorMessages.CANNOT_GET_CONSISTEMT_METHOD_RESOLUTION, bases);
+                throw PRaiseNode.getUncached().raise(TypeError, ErrorMessages.CANNOT_GET_CONSISTEMT_METHOD_RESOLUTION, bases.toString());
             }
 
             return mro.toArray(new PythonAbstractClass[mro.size()]);

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/ErrorMessages.java

@@ -120,7 +120,7 @@ public abstract class ErrorMessages {
     public static final String CANNOT_CREATE_WEAK_REFERENCE_TO = "cannot create weak reference to '%p' object";
     public static final String CANNOT_DELETE_ATTRIBUTE = "can't delete %s.%s";
     public static final String CANNOT_GET_SHAPE_OF_NATIVE_CLS = "cannot get shape of native class";
-    public static final String CANNOT_GET_CONSISTEMT_METHOD_RESOLUTION = "Cannot create a consistent method resolution order (MRO) for bases %p, %p";
+    public static final String CANNOT_GET_CONSISTEMT_METHOD_RESOLUTION = "Cannot create a consistent method resolution\norder (MRO) for bases %s";
     public static final String CANNOT_HANDLE_ZIP_FILE = "cannot handle Zip file: '%s'";
     public static final String CANNOT_IMPORT_NAME = "cannot import name '%s'";
     public static final String CANNOT_INITIALIZE_WITH = "cannot initialize %s with %s%s";