Please review fix 6674329: "javatestClassDir" variable may be incorrectly e
URLDecoder.decode() method is used to get rid of '%20' in path obtained from URL.
The simplest way to reproduce the bug:
# mkdir "dir with spaces"
# cp javatest.jar dir\ with\ spaces
# java -jar dir\ with\ spaces/javatest.jar
More cases of the wrong behaviour are described in the CR evaluation.