fix #8799 - Follow conventional visitor design pattern by renaming `visit(Visitor)` to `accept(Visitor)`

git-svn-id: http://josm.openstreetmap.de/svn/trunk@6009 0c6e7542-c601-0410-84e7-c038aed88b3b
fix #8799 - Follow conventional visitor design pattern by renaming `visit(Visitor)` to `accept(Visitor)` (missing files from previous commit)

git-svn-id: http://josm.openstreetmap.de/svn/trunk@6010 0c6e7542-c601-0410-84e7-c038aed88b3b
Merge branch 'master' into mirror