Source version 4.2.0 based on SVN revision 4212 is identical to 4107 except to test files below.
removing test/core/com/itextpdf/testutils/ClearOutTempFilesDuringTest.java
removing test/core/com/itextpdf/testutils/TestResourceUtils.java
They have been removed since they fail on compile.
These are snapshots no changes to orginal source is applied.