see #8902 - Small performance enhancements / coding style (patches by shinigami):
 * bytestohexstring.diff: byte[] to hex string change + small test
 * collfix.diff : problem in generic collection definition
 * styleiteration.diff: useless iteration to do end of list
 * environment.diff: Environment - merge chained ops (each created copy of env.) to one

git-svn-id: http://josm.openstreetmap.de/svn/trunk@6175 0c6e7542-c601-0410-84e7-c038aed88b3b