reformulating tracebug regexps to be language agnostic

git-svn-id: https://svn.r-project.org/ESS/trunk@5635 0bbaf3bd-34e0-0310-bf65-c717079852d4
todo

git-svn-id: https://svn.r-project.org/ESS/trunk@5636 0bbaf3bd-34e0-0310-bf65-c717079852d4