Changeset 6911 for trunk/sources/HeuristicLab.Tests/Test References/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding-3.4.accessor

#1657: Corrected and adapted implementation of !PTC2 to handle symbol frequencies correctly and to always create trees of the target size. Additionally the performance of the grammars have been improved and a unit test was added.